College Algebra 7th Edition

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

Chapter 2, Functions - Chapter 2 Review - Exercises: 51

Answer

Net change: -4 Average rate of change: -1

Work Step by Step

We find the net change from $x=4$ to $x=8$: $f(8)-f(4)=8-12=-4$ Next we find the average rate of change for this interval: $\frac{f(8)-f(4)}{8-4}=\frac{-4}{4}=-1$
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