Answer
Yes.
Work Step by Step
Check to see that $f(a)=f(b)$ means $a=b$.
$2a-8=2b-8$
Add 8 to each side.
$2a=2b$
Divide each side by 2.
$a=b$. Yes.
College Algebra (11th Edition)
by Lial, Margaret L.; Hornsby John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671791
ISBN 13:
978-0-32167-179-0
Chapter 4 - Section 4.1 - Inverse Functions - 4.1 Exercises - Page 394: 9
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