Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 3 - Introduction to Graphing - 3.3 Graphing and Intercepts - 3.3 Exercise Set - Page 180: 83


The graph of $y=8$ is a horizontal line because all points on its graph have a y-coordinate of $8$. Connecting these points forms a horizontal line.

Work Step by Step

The equation $y=8$ means the points on the graph can have any x-value as long as their y-coordinate is $8$. Thus, the points $(0, 8)$, $(1, 8)$, $(-1, 8)$, and $(-2, 8)$ are all on the graph of $y=8$. Plotting these points would show that when connected, a horizontal line is formed.
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