Answer
$9$
Work Step by Step
General formula for average rate of change from $a$ to $b$: $\frac{f(b)-f(a)}{b-a}.$
Hence here: $\frac{f(2)-f(0.5)}{2-0.5}=\frac{(9\cdot2)-(9\cdot0.5)}{1.5}=\frac{18-4.5}{1.5}=\frac{13.5}{1.5}=9.$
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 11 - Systems of Equations and Inequalities - 11.7 Systems of Inequalities - 11.7 Assess Your Understanding - Page 785: 62
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