#### Answer

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#### Work Step by Step

The equation of a line in slope-intercept form is
$$y=mx+b$$
where $m$ is the slope and $b$ is the y-intercept.
So, in the case of
$$y=-6$$
the line is horizontal and
$$m=0$$

Published by
Pearson

ISBN 10:
0321749006

ISBN 13:
978-0-32174-900-0

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