Answer
See below.
Work Step by Step
$f(2a)=f(a+a)=f(a)+f(a)=2f(a)$
Also $f(0)=f(a-a)=f(a)-f(a)=0$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 2 Linear Equations and Functions - 2.1 Represent Relations and Functions - 2.1 Exercises - Skill Practice - Page 78: 41
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