Answer
$\frac{f(b)-f(a)}{b-a}$
Work Step by Step
The average rate of change is defined as follows: $$\begin{aligned}\text{average rate of change}&=\frac{\text{change in }y}{\text{change in }x}\\
&=\frac{f(b)-f(a)}{b-a}.\end{aligned}$$
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 2 - Section 2.4 - Average Rate of Change of a Function - 2.4 Exercises - Page 187: 2
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