Answer
$y+4=0$
See graph.
Work Step by Step
Step 1. Given point $P(2,-4)$ and slope $m=0$, we can write the point-slope form of the equation as $y+4=0(x-2)$ or $y+4=0$
Step 2. We can plot the above line as shown in the figure. See graph.
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 1 - Graphs - 1.3 Lines - 1.3 Assess Your Understanding - Page 30: 30
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