Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 2 Linear Equations and Functions - 2.5 Model Direct Variations - 2.5 Exercises - Problem Solving - Page 111: 44c


Only part a is direct variation

Work Step by Step

The equation in part b is not direct variation, for it is: $$d_2=6000-75t$$ This is not in the form $y=ax$. However, the equation in part a ($d_1=75t)$ is in the correct form, so it is direct variation.
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