Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter F - Foundations: A Prelude to Functions - Section F.3 Lines - F.3 Assess Your Understanding - Page 30: 56



Work Step by Step

If the slope is undefined, we can surely state that the line is vertical. The equation of a vertical line is always in the form of: $x=a$, where $a$ is constant. Here, the point given is $(3,8)$, which is on the line. For this point, $x=3$ and this should be true for the other points on the line. The equation is, therefore: $x=3$
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