Answer
$-2$
Work Step by Step
From the given graph, we see that $f(1)=0$
From the given graph, we see that $f(-1)=2$
$f(1)-f(-1)=0-2=-2$
Finite Math and Applied Calculus (6th Edition)
by Waner, Stefan; Costenoble, Steven
Published by
Brooks Cole
ISBN 10:
1133607705
ISBN 13:
978-1-13360-770-0
Chapter 1 - Review - Review Exercises - Page 106: 4d
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