College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter 3 - Polynomial and Rational Functions - Exercise Set 3.7 - Page 431: 22


31 lb

Work Step by Step

Solving Variation Problems (see p. 424) 1. $\ \ $Write an equation that models the given English statement. 2. $\ \ $Substitute the given pair of values into the equation in step 1 and find the value of k, the constant of variation. 3. $\ \ $Substitute the value of k into the equation in step 1. 4. $\ \ $Use the equation from step 3 to answer the problem's question. ----------- 1. M varies directly as E, $\qquad M=kE$ 2. $60=k(360) \qquad /\div 360$ $\displaystyle \frac{60}{360}=k$ $k=\displaystyle \frac{1}{6}$ 3. $M=\displaystyle \frac{1}{6}E$ 4. $M=\displaystyle \frac{1}{6}(186)=31$ lb
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