Answer
$m=0$
Work Step by Step
Linear equations of the form $y=b$ is a horizontal line passing through $(0,b).$ Hence, the graph of $
y=-1
$ is a horizontal line passing through $
(0,-1)
.$
The slope, $m,$ of horizontal lines is $
m=0
.$
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter R - Elementary Algebra Review - R.3 Introduction to Graphing - R.3 Exercise Set - Page 954: 38
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