#### Answer

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#### Work Step by Step

$y=mx+b$
is the slope intercept form: slope m and y-intercept b.
So, we solve $y+4=9$ for y:
$y=9-4$
$y=5$
$(y=0x+5$, a horizontal line$)$
m=0

Published by
Pearson

ISBN 10:
0321749006

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

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