College Algebra (11th Edition)

Published by Pearson
ISBN 10: 0321671791
ISBN 13: 978-0-32167-179-0

Chapter 2 - Section 2.7 - Graphing Techniques - 2.7 Exercises - Page 255: 12


See the picture below.

Work Step by Step

The parent function is $y=x^2$ (in red), but the graph of $g(x)=3\times x^2$ (in blue) will be narrower, as the coefficient multplies each y-value of the parent function by $3$. For drawing the exact parent graph, here is the table of values: $f(-2)= -2^2=4$ $f(-1)= -1^2=1$ $f(0)= 0^2=0$ $f(1)= 1^2=1$ $f(2)=2^2=4$ By the use of graph transformation techniques, the graph is stretched by a factor of $3$. For drawing the exact graph of $g(x)$ here is the table of values of the given function: $g(-2)=3\times -2^2=12$ $g(-1)=3\times -1^2=3$ $g(0)=3\times 0^2=0$ $g(1)=3\times 1^2=3$ $g(2)=3\times2^2=12$
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