Algebra 1: Common Core (15th Edition)

by Charles, Randall I.

Published by Prentice Hall

ISBN 10: 0133281140

ISBN 13: 978-0-13328-114-9

Chapter 5 - Linear Functions - Chapter Review - Page 354: 13

Answer

$y=17.5$

Work Step by Step

The function form of a direct variation is $y=kx$. $15=k(6)$ - Substitute $x=6$ and $y=15$- $15=6k$ $2.5=k$ The direct variation equation would be $y=2.5x$ $y=(2.5)(7)$ when $x=7$ so therefore $y=17.5$

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