College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 1, Equations and Graphs - Section 1.10 - Modeling Variation - 1.10 Exercises - Page 164: 6


(a) not proportional (b) inversely proportional

Work Step by Step

(a) $y$ is not proportional to $x$ in the equation $y= \frac{3}{x+1}$ because it does not have the form $y=kx$ or $y=k/x$. (b) $y$ is inversely proportional to $x$ in the equation $y= \frac{3}{x}$, since it has the form of $y=k/x$.
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