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 - Page 268: 55


Net change: 9 Average rate of change: 3

Work Step by Step

We find the net change from $x=1$ to $x=4$: $f(4)-f(1)=[4^{2}-2*4]-[1^{2}-2*1]=(16-8)-(1-2)=8-(-1)=8+1=9$ Next we find the average rate of change for this interval: $\frac{f(4)-f(1)}{4-1}=\frac{9}{3}=3$
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