Answer
$y=3x^2-3$
Work Step by Step
To vertically stretch the graph of $y=x^2-1$ by a factor of 3, we multiply the right hand side by 3. Hence, the desired equation is $y=3(x^2-1)=3x^2-3$.
Thomas' Calculus 13th Edition
by Thomas Jr., George B.
Published by
Pearson
ISBN 10:
0-32187-896-5
ISBN 13:
978-0-32187-896-0
Chapter 1: Functions - Section 1.2 - Combining Functions; Shifting and Scaling Graphs - Exercises 1.2 - Page 20: 57
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