Finite Math and Applied Calculus (6th Edition)

Published by Brooks Cole
ISBN 10: 1133607705
ISBN 13: 978-1-13360-770-0

Chapter 1 - Section 1.3 - Linear Functions and Models - Exercises - Page 91: 85b

Answer

4; 8

Work Step by Step

For every 4 (dollar) increase in price, sales of cell phones decrease by 8 units. Because $85-81=4$ and $111-103=8$
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