Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 1 - Section 1.10 - Modeling with Functions - Exercise Set - Page 292: 12


a. $12400-60x$, b. $12400x-60x^2$

Work Step by Step

a. We can express the relation between the number of passengers and the ticket price as $N(x)=7000+60(90-x)=12400-60x$, so that $N(90)=7000$ and $N$ increases by 60 for every dollar decrease in price. b. The revenue can be expressed as $R=Nx=12400x-60x^2$
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