What is the initial value of a function?

It is the output when the input is 0, the b in y = mx + b. In the car wash task, the initial value is the negative $72 spent on supplies before any cars are washed.

What is a break even point in a profit function?

It is the input where the profit is $0. In Plan a Car Wash Fundraiser With Functions, students find how many cars the class must wash to cover the supply cost.

8th Grade Comparing and Modeling Functions Worksheets

Ages 13-14 · Free previews · Print-ready PDFs

Written by Adi Ackerman, Head Teacher

Comparing functions means finding each one's rate of change and initial value, even when one is a table and the other is a graph, an equation or a description. There are 2 sheets for 8th grade here, each with an answer key. Compare Two Functions Given in Different Forms pairs tables, graphs, equations and words. Plan a Car Wash Fundraiser With Functions models profit with $72 in supplies and $8 a car, finds the break even point and compares two plans. The sheets practice 8.F.A.2 and 8.F.B.4.

8th Grade Math Functions Comparing and modeling functions Clear All

$Compare Two Functions Given in Different Forms - 8th Grade Functions worksheet preview$

Compare Two Functions Given in Different Forms

Grade8th Grade

TopicFunctions

$Plan a Car Wash Fundraiser With Functions - 8th Grade Functions worksheet preview$

Plan a Car Wash Fundraiser With Functions

Grade8th Grade

TopicFunctions

More functions worksheets

Explore all of our 8th grade functions worksheets, covering what is a function, linear and nonlinear functions, comparing and modeling functions, qualitative graphs, and more.

What is a function Linear and nonlinear functions Qualitative graphs Reference sheets

Frequently Asked Questions

Find the rate of change and the initial value of each, whether it is a table, a graph, an equation or a description. Then compare them or find each value at the same x.

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