Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 2 - Functions and Their Graphs - 2.5 Graphing Techniques: Transformations - 2.5 Assess Your Understanding - Page 104: 60

Answer

See graph

Work Step by Step

We are given the function: $g(x)=4\sqrt{2-x}$ We start graphing with the basic function $a(x)=\sqrt x$. We reflect $a(x)$ about the $y$-axis to get $b(x)=\sqrt{-x}$. Then we horizontally shift $b(x)$ 2 units to the right to get $c(x)=\sqrt{-(x-2)}$. Finally we vertically stretch $c(x)$ by a factor of 4 to get $g(x)=4\sqrt{2-x}$. We use 3 points: $(-2,8),(1,4),(2,0)$.
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