Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 4 - An Introduction to Functions - 4-1 Using Graphs to Relate Two Quantities - Practice and Problem-Solving Exercises - Page 237: 5

Answer

The variables are total cost and number of pounds.

Work Step by Step

To find variables you look at the labels on the x and y axis. If you look at the x axis then the variable is total cost and if you look at the y axis then the variable is number of pounds.
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