Answer
$y=7$
Work Step by Step
Horizontal lines have equations of form
$y=a$
(all points have the same $y$-cordinate, a).
Here, $a=7$, so the equation is
$y=7$
Calculus with Applications (10th Edition)
by Lial, Margaret L.; Greenwell, Raymond N.; Ritchey, Nathan P.
Published by
Pearson
ISBN 10:
0321749006
ISBN 13:
978-0-32174-900-0
Chapter 1 - Linear Functions - 1.1 Slopes and Equations of Lines - 1.1 Exercises - Page 13: 28
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