Precalculus (10th Edition)

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

Chapter 1 - Graphs - Chapter Review - Review Exercises - Page 41: 6

Answer

The $x$-intercept is $0$. The $y$-intercept is $0$ The graph of the equation is symmetric about the $x$-axis.

Work Step by Step

To find the $x$-intercept, set $y=0$ then solve for $x$: $2x=3y^2$ $2x=3(0)^2$ $2x=0$ $x=0$ Therefore, the $x$-intercept is $0$. To find the $y$-intercept, set $x=0$ then solve for $y$: $2x=3y^2$ $2(0)=3y^2$ $0=y^2$ $0=y$ Therefore, the $y$-intercept is $0$. Test for symmetry with respect to the $x$-axis by substituting $-y$ to $y$ in the original equation: $2x=3y^2$ $2x=3(-y)^2$ $2x=3y^2$ Since the result is the same as the original equation, then the graph of the the equation is symmetric about the $x$-axis Test for symmetry with respect to the $y$-axis by substituting $-x$ to $x$ in the original equation: $2x=3y^2$ $2(-x)=3y^2$ $-2x=3y^2$ Since the result is different from the original equation, then the graph of the equation is NOT symmetric about the $y$-axis Test for symmetry with respect to the origin by substituting $-x$ to $x$ and $-y$ to $y$ in the original equation: $2x=3y^2$ $2(-x)=3(-y)^2$ $-2x=3y^2$ Since the result is different from the given equation, then the graph of the equation is NOT symmetric about the origin.
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