Answer
$3$
Work Step by Step
$=\frac{f(a+h)-f(a)}{h}$
Use $f(x)=3x+7$ in the given function.
$=\frac{3(a+h)+7-(3a+7)}{h}$
$=\frac{3a+3h+7-3a-7}{h}$
$=\frac{3h}{h}$
$=3$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 2 - Section 2.1 - Introduction to Functions - Exercise Set - Page 114: 49
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