Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 1 - Section 1.3 - More on Functions and Their Graphs - Exercise Set - Page 200: 118

Answer

The equation in the example is symmetric with respect to the $y$-axis.

Work Step by Step

To verify that the equation is symmetric with respect of the $y$ -axis, substitute $x=-x$ in the above equation. If after putting $x=-x$, the resultant equation is the same as the given equation, then the equation is symmetric with respect to the $y$-axis. $\begin{align} & y={{x}^{2}}-2 \\ & y={{\left( -x \right)}^{2}}-2\text{ } \\ & y={{x}^{2}}-2 \end{align}$ Since the resultant equation is the same as the given equation, the equation is symmetric with respect to the $y$-axis.
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