Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 5 - Linear Functions - 5-5 Standard Form - Practice and Problem-Solving Exercises - Page 326: 26

Answer

Vertical

Work Step by Step

When x is set equal to a constant, this means that the line has no run to it. That means that the line is infinitely steep, for y (the rise) changes, but x (the run) does not change. This means that the line $x=-1.8$ is vertical.
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