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 - Chapter Review - Page 284: 7

Answer

See answer below

Work Step by Step

The independent variable is the Number of Snacks Purchased (s). The dependent variable is the Total Cost (C). Each time $s$ increases by 1, $C$ increases by 3. The total cost is the starting cost plus three times the number of snacks purchased: $y= 18+3x$
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