Answer
$x=-1$
$y=3x$
Work Step by Step
$x$ varies directly with $y$
$y=kx$
$y=\frac{12}{4}x$
$y=3x$
Determine x by substituting y in the variation equation:
$y=3x$
$x=\frac{y}{3}$
$x=\frac{-3}{3}$
$x=-1$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 5 Polynomials and Polynomial Functions - 5.2 Evaluate and Graph Polynomial Functions - 5.2 Exercises - Mixed Review - Page 344: 67
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