Plot the point $(-1,-1)$ then plot the point that is symmetric to it with respect to (a) the $x$-axis; (b) the $y$-axis; (c) the origin
a. The $x$-axis
If the point $(-x,-y)$ is reflected over the $x$-axis, then the image is the point $(-x,y)$. So
$(-1,-1) \to (-1,1)$
b. The $y$-axis
If the point $(-x,-y)$ is reflected over the $y$-axis, then the image is the point $(x,-y)$. So
$(-1,-1) \to (1,-1)$
c. The origin
If the point $(-x,-y)$ is reflected over the origin then the image is the point $(x,y)$. So
$(-1,-1) \to (1,1)$
Monday, April 23, 2018
Precalculus, Chapter 1, 1.2, Section 1.2, Problem 34
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