Answer
Missing terms are:
$$\boxed{increases}~~~\boxed{decreases}$$
Work Step by Step
If $y$ varies directly to $x$ ($y=kx$) and $k>0$, then if $x$ increases, $y$ also increases and if $x$decreases, $y$ also decreases.
College Algebra (11th Edition)
by Lial, Margaret L.; Hornsby John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671791
ISBN 13:
978-0-32167-179-0
Chapter 3 - Section 3.6 - Variation - 3.6 Exercises - Page 369: 47
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