Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 7 - Algebra: Graphs, Functions, and Linear Systems - 7.2 Linear Functions and Their Graphs - Exercise Set 7.2: 70

Answer

A slope of $0$ means the line is horizontal.

Work Step by Step

RECALL: Slope is equal to the rise (change in y) over run (change in x). Thus, a slope of $0$ means that there is no change in y-value. This also means that all points on the line have the same y-coordinate. Points with the same y-coordinate belong to the same horizontal line. Thus, a slope of $0$ means that the line is horizontal.
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