Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter 2 - Linear and Quadratic Functions - Section 2.1 Properties of Linear Functions and Linear Models - 2.1 Assess Your Understanding - Page 126: 3

Answer

$18$

Work Step by Step

The average rate of change from $2$ to $4$ is given by $\frac{f(4)-f(2)}{4-2}$. Thus, the average rate of change from $2$ to $4$ is: $\dfrac{f(4)-f(2)}{4-2}\\$ $=\dfrac{3(4)^2-2 -(3(2)^2-2)}{2}\\$ $=\dfrac{36}{2}=18$
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