College Algebra (11th Edition)

Published by Pearson
ISBN 10: 0321671791
ISBN 13: 978-0-32167-179-0

Chapter 3 - Section 3.6 - Variation - 3.6 Exercises: 2

Answer

$d$ varies directly with $s$ and the constant of this variation is $\frac{1}{5}$.

Work Step by Step

The general equation for direct variation is $y=kx$, where k is the constant of the variation. Here, $d=\frac{1}{5}s$, means that $d$ varies directly with $s$. The equation for direct variation here, is $d=k\times s$ As $\frac{1}{5}$ is constant, this will be the constant of the variation. Therefore the distance from a storm varies directly with the time between seeing lightning and hearing thunder, and the constant of this variation is $\frac{1}{5}$.
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