Answer
$f$
Work Step by Step
RECALL:
A direct variation has an equation of the form $y=kx$ where $k$ is the constant of variation (constant ratio).
Thus, the answer is $f$.
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 7 - Functions and Graphs - 7.5 Formulas, Applications, and Variation - 7.5 Exercise Set - Page 485: 2
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