# Functions and equations

Here is a list of all of the skills that cover functions and equations! These skills are organised by grade, and you can move your mouse over any skill name to preview the skill. To start practising, just click on any link. IXL will track your score, and the questions will automatically increase in difficulty as you improve!

## Grade 2 skills

- D.8 Addition input/output tables - sums to 20
- E.8 Subtraction input/output tables - up to 18
- F.7 Addition input/output tables - up to two digits
- G.7 Subtraction input/output tables - up to two digits
- H.3 Addition input/output tables - up to three digits
- I.3 Subtraction input/output tables - up to three digits
- N.5 Input/output tables - write the rule - up to 20
- N.10 Input/output tables - write the rule - up to 100

## Grade 6 skills

- U.1 Which x satisfies an equation?
- U.2 Write an equation from words
- U.3 Model and solve equations using algebra tiles
- U.4 Write and solve equations that represent diagrams
- U.5 Solve one-step equations with whole numbers
- U.6 Solve one-step equations with decimals
- U.7 Solve one-step equations: word problems
- V.1 Does (x, y) satisfy an equation?
- V.2 Identify independent and dependent variables
- V.3 Solve word problems involving two-variable equations
- V.4 Complete a table for a two-variable relationship
- V.5 Write a two-variable equation
- V.6 Identify the graph of an equation

## Grade 7 skills

- K.2 Write equations for proportional relationships from tables
- K.4 Find the constant of proportionality from a graph
- K.5 Write equations for proportional relationships from graphs
- K.6 Identify proportional relationships
- K.7 Interpret graphs of proportional relationships
- R.11 Solve equations using properties
- S.1 Which x satisfies an equation?
- S.2 Write an equation from words
- S.3 Model and solve equations using algebra tiles
- S.4 Write and solve equations that represent diagrams
- S.5 Solve one-step equations
- S.6 Solve two-step equations
- S.7 Solve equations: word problems
- S.8 Solve equations involving like terms
- S.9 Solve equations: complete the solution
- T.1 Does (x, y) satisfy the equation?
- T.2 Identify independent and dependent variables
- T.3 Solve word problems involving two-variable equations
- T.4 Complete a table for a two-variable relationship
- T.5 Write a two-variable equation
- T.6 Identify the graph of an equation
- T.7 Graph a two-variable equation
- T.8 Interpret a graph: word problems
- T.9 Write an equation from a graph using a table

## Grade 8 skills

- F.9 Solve equations involving squares and square roots
- F.12 Solve equations involving cubes and cube roots
- I.2 Write equations for proportional relationships from tables
- I.4 Find the constant of proportionality from a graph
- I.5 Write equations for proportional relationships from graphs
- I.6 Identify proportional relationships
- I.8 Interpret graphs of proportional relationships
- I.9 Write and solve equations for proportional relationships
- X.1 Which x satisfies an equation?
- X.2 Write an equation from words
- X.3 Model and solve equations using algebra tiles
- X.4 Write and solve equations that represent diagrams
- X.6 Solve one-step equations
- X.7 Solve two-step equations
- X.8 Solve multi-step equations
- X.9 Solve equations involving like terms
- X.10 Solve equations with variables on both sides
- X.11 Solve equations: mixed review
- X.12 Solve equations: complete the solution
- X.13 Solve equations: word problems
- Y.1 Identify functions
- Y.2 Does (x, y) satisfy the linear function?
- Y.3 Identify independent and dependent variables
- Y.6 Complete a table for a linear function
- Y.7 Complete a table and graph a linear function
- Y.8 Graph a line from an equation
- Y.9 Interpret the graph of a linear function: word problems
- Y.10 Write a linear function from a table
- Y.11 Write linear functions: word problems
- Z.1 Identify linear and nonlinear functions
- Z.2 Does (x, y) satisfy the nonlinear function?
- Z.3 Find values using function graphs
- Z.4 Complete a table for a function graph

## Grade 9 skills

- J.4 Write variable equations
- J.5 Does x satisfy the equation?
- J.6 Solve equations using order of operations
- K.1 Model and solve equations using algebra tiles
- K.2 Write and solve equations that represent diagrams
- K.3 Solve one-step linear equations
- K.4 Solve two-step linear equations
- K.5 Solve advanced linear equations
- K.6 Solve equations with variables on both sides
- K.7 Solve equations: complete the solution
- K.8 Find the number of solutions
- K.10 Solve linear equations: word problems
- K.11 Solve linear equations: mixed review
- M.7 Scatter plots: line of best fit
- O.1 Relations: convert between tables, graphs, mappings and lists of points
- O.2 Identify independent and dependent variables
- O.3 Identify functions
- O.4 Identify functions: vertical line test
- O.5 Find values using function graphs
- O.6 Evaluate a function
- O.7 Evaluate a function: plug in an expression
- O.8 Complete a function table from a graph
- O.9 Complete a function table from an equation
- O.10 Interpret the graph of a function: word problems
- P.1 Identify proportional relationships
- P.2 Find the constant of variation
- P.3 Graph a proportional relationship
- P.4 Write direct variation equations
- P.5 Write and solve direct variation equations
- P.6 Identify direct variation and inverse variation
- P.7 Write inverse variation equations
- P.8 Write and solve inverse variation equations
- Q.1 Identify linear functions
- Q.2 Find the gradient of a graph
- Q.3 Find the gradient from two points
- Q.5 Find the gradient and y-intercept of a linear equation
- Q.6 Graph an equation in y=mx+c form
- Q.7 Write an equation in y=mx+c form from a graph
- Q.8 Write an equation in y=mx+c form
- Q.9 Write an equation in y=mx+c form from a table
- Q.10 Write an equation in y=mx+c form from a word problem
- Q.11 Linear equations: solve for y
- Q.12 Write linear functions to solve word problems
- Q.13 Complete a table and graph a linear function
- Q.14 Compare linear functions: graphs, tables and equations
- Q.15 Write equations in standard form
- Q.16 Standard form: find x- and y-intercepts
- Q.17 Standard form: graph an equation
- Q.18 Equations of horizontal and vertical lines
- Q.19 Graph a horizontal or vertical line
- Q.20 Point-gradient form: graph an equation
- Q.21 Point-gradient form: write an equation
- Q.22 Point-gradient form: write an equation from a graph
- Q.23 Gradients of parallel and perpendicular lines
- Q.24 Write an equation for a parallel or perpendicular line
- Q.25 Transformations of linear functions
- R.1 Is (x, y) a solution to the simultaneous equations?
- R.2 Solve simultaneous equations by graphing
- R.3 Solve simultaneous equations by graphing: word problems
- R.4 Find the number of solutions to simultaneous equations by graphing
- R.5 Find the number of solutions to simultaneous equations
- R.6 Solve simultaneous equations using substitution
- R.7 Solve simultaneous equations using substitution: word problems
- R.8 Solve simultaneous equations using elimination
- R.9 Solve simultaneous equations using elimination: word problems
- Y.6 Solve rational equations
- Z.4 Rate of travel: word problems
- Z.5 Weighted averages: word problems

## Grade 10 skills

- D.1 Model and solve equations using algebra tiles
- D.2 Write and solve equations that represent diagrams
- D.3 Solve one-step linear equations
- D.4 Solve two-step linear equations
- D.5 Solve advanced linear equations
- D.6 Solve equations with variables on both sides
- D.7 Solve equations: complete the solution
- D.8 Find the number of solutions
- D.10 Solve linear equations: word problems
- D.11 Solve linear equations: mixed review
- F.1 Relations: convert between tables, graphs, mappings and lists of points
- F.2 Domain and range of relations
- F.3 Identify independent and dependent variables
- F.4 Identify functions
- F.5 Complete a function table from an equation
- F.6 Find values using function graphs
- F.7 Evaluate a function
- F.8 Complete a function table from a graph
- F.9 Interpret the graph of a function: word problems
- G.1 Identify linear functions
- G.2 Find the gradient of a graph
- G.3 Find the gradient from two points
- G.5 Find the gradient and y-intercept of a linear equation
- G.6 Graph an equation in y=mx+c form
- G.7 Write an equation in y=mx+c form from a graph
- G.8 Write an equation in y=mx+c form
- G.9 Write an equation in y=mx+c form from a table
- G.10 Write an equation in y=mx+c form from a word problem
- G.11 Write linear functions to solve word problems
- G.12 Complete a table and graph a linear function
- G.13 Compare linear functions: graphs, tables and equations
- G.14 Write equations in standard form
- G.15 Standard form: find x- and y-intercepts
- G.16 Standard form: graph an equation
- G.17 Equations of horizontal and vertical lines
- G.18 Graph a horizontal or vertical line
- G.19 Point-gradient form: graph an equation
- G.20 Point-gradient form: write an equation
- G.21 Point-gradient form: write an equation from a graph
- G.22 Gradients of parallel and perpendicular lines
- G.23 Write an equation for a parallel or perpendicular line
- G.26 Transformations of linear functions
- H.1 Is (x, y) a solution to the simultaneous equations?
- H.2 Solve simultaneous equations by graphing
- H.3 Solve simultaneous equations by graphing: word problems
- H.4 Find the number of solutions to simultaneous equations by graphing
- H.5 Find the number of solutions to simultaneous equations
- H.6 Solve simultaneous equations using substitution
- H.7 Solve simultaneous equations using substitution: word problems
- H.8 Solve simultaneous equations using elimination
- H.9 Solve simultaneous equations using elimination: word problems
- H.10 Solve simultaneous equations using any method
- H.11 Solve simultaneous equations using any method: word problems
- J.1 Evaluate an exponential function
- J.2 Match exponential functions and graphs
- J.3 Domain and range of exponential functions
- O.1 Characteristics of quadratic functions
- O.2 Complete a function table: quadratic functions
- O.3 Solve a quadratic equation using square roots
- O.4 Solve a quadratic equation using the zero product property
- O.5 Solve a quadratic equation by factorising
- O.7 Solve a quadratic equation by completing the square
- O.8 Solve a quadratic equation using the quadratic formula
- O.9 Using the discriminant
- P.1 Identify linear, quadratic and exponential functions from graphs
- P.2 Identify linear, quadratic and exponential functions from tables
- P.3 Write linear, quadratic and exponential functions
- P.4 Linear functions over unit intervals
- P.5 Exponential functions over unit intervals
- P.6 Describe linear and exponential growth and decay
- S.1 Rational functions: asymptotes and excluded values
- S.7 Solve rational equations
- CC.2 Rate of travel: word problems
- CC.3 Weighted averages: word problems
- FF.6 Scatter plots: line of best fit

## Grade 11 skills

- A.1 Domain and range
- A.2 Identify functions
- A.3 Evaluate functions
- A.4 Find values using function graphs
- A.5 Complete a table for a function graph
- A.6 Find the gradient of a linear function
- A.7 Graph a linear function
- A.8 Write the equation of a linear function
- A.9 Linear functions over unit intervals
- B.1 Is (x, y) a solution to the simultaneous equations?
- B.2 Solve simultaneous equations by graphing
- B.3 Solve simultaneous equations by graphing: word problems
- B.6 Solve simultaneous equations using substitution: word problems
- B.7 Solve simultaneous equations using elimination
- B.8 Solve simultaneous equations using elimination: word problems
- B.9 Solve simultaneous equations using any method
- B.10 Solve simultaneous equations using any method: word problems
- B.11 Solve non-linear simultaneous equations
- E.1 Characteristics of quadratic functions
- E.2 Complete a function table: quadratic functions
- E.3 Find a quadratic function
- E.4 Graph a quadratic function
- E.5 Match quadratic functions and graphs
- E.6 Solve a quadratic equation using square roots
- E.7 Solve a quadratic equation using the zero product property
- E.8 Solve a quadratic equation by factorising
- E.9 Complete the square
- E.10 Solve a quadratic equation using the quadratic formula
- E.11 Using the discriminant
- F.7 Solve polynomial equations
- F.14 Match polynomials and graphs
- G.12 Domain and range of radical functions
- G.13 Solve radical equations
- I.1 Rational functions: asymptotes and excluded values
- I.7 Solve rational equations
- J.1 Add and subtract functions
- J.2 Multiply functions
- J.3 Divide functions
- J.4 Composition of linear functions: find a value
- J.5 Composition of linear functions: find an equation
- J.6 Composition of linear and quadratic functions: find a value
- J.7 Composition of linear and quadratic functions: find an equation
- J.8 Identify inverse functions
- J.9 Find values of inverse functions from tables
- J.10 Find values of inverse functions from graphs
- J.11 Find inverse functions and relations
- L.9 Exponential functions over unit intervals
- L.10 Describe linear and exponential growth and decay
- S.1 Find properties of sine functions
- S.5 Find properties of cosine functions
- T.1 Complementary angle identities
- T.2 Symmetry and periodicity of trigonometric functions
- T.3 Trigonometric identities I
- T.4 Trigonometric identities II

## Grade 12 skills

- A.1 Domain and range
- A.2 Identify functions
- A.3 Find the gradient of a linear function
- A.4 Graph a linear function
- A.5 Write the equation of a linear function
- A.6 Linear functions over unit intervals
- A.7 Evaluate functions
- A.8 Find values using function graphs
- A.9 Complete a table for a function graph
- A.10 Add, subtract, multiply and divide functions
- A.11 Composition of functions
- A.12 Identify inverse functions
- A.13 Find values of inverse functions from tables
- A.14 Find values of inverse functions from graphs
- A.15 Find inverse functions and relations
- B.1 Translations of functions
- B.2 Reflections of functions
- B.3 Dilations of functions
- B.4 Transformations of functions
- B.5 Function transformation rules
- B.6 Describe function transformations
- C.1 Characteristics of quadratic functions
- C.2 Find the maximum or minimum value of a quadratic function
- C.3 Graph a quadratic function
- C.4 Match quadratic functions and graphs
- C.5 Solve a quadratic equation using square roots
- C.6 Solve a quadratic equation by factorising
- C.7 Solve a quadratic equation by completing the square
- C.8 Solve a quadratic equation using the quadratic formula
- C.9 Using the discriminant
- D.11 Match polynomials and graphs
- D.13 Solve equations with sums and differences of cubes
- D.15 Solve equations using a quadratic pattern
- E.1 Rational functions: asymptotes and excluded values
- E.2 Solve rational equations
- E.3 Check whether two rational functions are inverses
- F.14 Exponential functions over unit intervals
- F.15 Describe linear and exponential growth and decay
- I.1 Find properties of sine functions
- I.5 Find properties of cosine functions
- J.1 Complementary angle identities
- J.2 Symmetry and periodicity of trigonometric functions
- J.3 Trigonometric identities I
- J.4 Trigonometric identities II
- S.8 Find the equation of a regression line
- T.1 Find limits using graphs
- T.2 Find one-sided limits using graphs
- T.3 Determine if a limit exists
- U.1 Find limits using addition, subtraction and multiplication laws
- U.2 Find limits using the division law
- U.3 Find limits using power and root laws
- U.4 Find limits using limit laws
- U.5 Find limits of polynomials and rational functions
- U.6 Find limits involving factorisation
- U.7 Find limits involving absolute value functions
- U.8 Find limits involving trigonometric functions
- V.1 Find limits at vertical asymptotes using graphs
- V.2 Determine end behaviour using graphs
- V.3 Determine end behaviour of polynomial and rational functions
- W.1 Find the limit at a vertical asymptote of a rational function I
- W.2 Find the limit at a vertical asymptote of a rational function II
- X.1 Identify graphs of continuous functions
- X.2 Determine continuity using graphs
- X.3 Determine one-sided continuity using graphs
- X.4 Find and analyse points of discontinuity using graphs
- X.5 Determine continuity on an interval using graphs
- X.6 Determine the continuity of a piecewise function at a point
- X.7 Make a piecewise function continuous
- X.8 Intermediate Value Theorem
- Z.1 Sum and difference rules
- Z.2 Power rule I
- Z.3 Power rule II
- Z.4 Find derivatives of polynomials I
- Z.5 Find derivatives of polynomials II
- Z.6 Find second derivatives of polynomials
- Z.7 Find derivatives of rational functions