Answer
See graph.
Work Step by Step
Start from the graph of $y=x^2$ (red), stretch vertically by a factor of $2$ to obtain $f(x)=2x^2$ (purple).
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 2 - Graphs and Functions - 2.7 Graphing Techniques - 2.7 Exercises - Page 273: 21
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