Answer
$y=-25x$
$y=-300$ when $x=12$
Work Step by Step
$y=kx$
Substitute $x$ with $-5$ and $y$ with $125$
$125=-5k$
$k=-25$
$y=-25x$
$y=-25(12)$
$y=-300$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 5 - Linear Functions - Chapter Review - 5-3, 5-4, and 5-5 Forms of Linear Equations - Page 351: 18
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