Answer
See below.
Work Step by Step
$y$ varies directly as $x$ can be modelled by the equation $y=kx$, where $k$ is the constant of variation.
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 6 - Section 6.8 - Modeling Using Variation - Concept and Vocabulary Check - Page 487: 1
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