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Chapter 12—Graphing

12-5 Defining Horizontal and Vertical Lines

Definition

  • A horizontal line is a straight line that lies parallel to the x axis on the coordinate plane. If the coordinate plane is set up in the customary fashion, horizontal lines on the plane run straight left and right.
  • A vertical line is a straight line that lies parallel to the y axis on the coordinate plan. If the coordinate plane is set up in the customary fashion, vertical  lines on the plane run straight up and down.

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Author: David L. Heiserman
Publisher: SweetHaven Publishing Services

Copyright © 2007, David L. Heiserman
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