College Algebra 7th Edition

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

Chapter 2, Functions - Section 2.4 - Average Rate of Change of a Function - 2.4 Exercises - Page 224: 8


(a) -2 (b) $-\frac{1}{2}$

Work Step by Step

(a) We calculate the net change between the two points given: Net change = $f(5)-f(1)=2-4=-2$ (b) We calculate the average rate of change between $(1,4)$ and $(5,2)$: Average rate of change = $\frac{2-4}{5-1}=\frac{-2}{4}=-\frac{1}{2}$
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