Grade 8 Math · Topic guide
Functions — Grade 8 Math
Understand a function as a rule connecting inputs and outputs. Read functions from tables, graphs, and other representations.
Practice more with MathNivoAndroid app coming soonExplore the idea here, then continue practicing in the Android app when available.
What you’ll learn
- Which function has the greater rate of change? Choose Same if their rates are equal.
- Write the linear function with the given rate and initial value.
- Classify the finite relation as Function or Not a function.
- Classify the discrete point graph as Function or Not a function.
Explore the skills
Choose an idea below to read a worked example and try one question.
- Compare linear functions in different representationsWhich function has the greater rate of change? Choose Same if their rates are equal.
- Build a linear function from dataWrite the linear function with the given rate and initial value.
- Understand a function as one output per inputClassify the finite relation as Function or Not a function.
- Identify functions from graphsClassify the discrete point graph as Function or Not a function.
- Identify functions from mappingsIdentify functions from mappings.
- Identify functions from tablesClassify the input-output table as Function or Not a function.
- Interpret initial valueInterpret initial value.
- Describe increasing/decreasing/constant behaviorDescribe increasing/decreasing/constant behavior.
- Model real situations with linear functionsModel real situations with linear functions.
- Sketch graphs from verbal descriptionsSketch graphs from verbal descriptions.
- Interpret rate of changeFind the exact rate of change of the linear function in the table.