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:
$\frac{f(8)-f(4)}{8-4}=\frac{-4}{4}=-1$
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter 2, Functions - Chapter 2 Review - Exercises - Page 268: 51
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