College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter 3 - Section 3.3 - Properties of Function - 3.3 Assess Your Understanding - Page 234: 66

Answer

$a.\quad-4$ $b.\quad-13$ $c.\quad-1$

Work Step by Step

Average rate of change from $a$ to $b$ $=\displaystyle \frac{\Delta y}{\Delta x}=\frac{f(b)-f(a)}{b-a},\quad a\neq b$ $a.$ $f(2)=-(2)^{3}+1=-7$ $f(0)=-(0)^{3}+1=1$ $\displaystyle \frac{f(2)-f(0)}{2-0}=\frac{(-7)-(1)}{2}=\frac{-8}{2}=-4$ $b.$ $f(3)=-(3)^{3}+1=-26$ $f(1)=-(1)^{3}+1=0$ $\displaystyle \frac{f(3)-f(1)}{3-1}=\frac{(-26)-(0)}{2}=\frac{-26}{2}=-13$ $c.$ $f(1)=-(1)^{3}+1=0$ $f(-1)=-(-1)^{3}+1=2$ $\displaystyle \frac{f(3)-f(1)}{1-(-1)}=\frac{(0)-(2)}{2}=\frac{-2}{2}=-1$
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