What is a horizontal line?

By Forinfos - 05/02/2026 - 0 comments

A horizontal line is a straight line that goes from left to right, which can be open or closed in form. On a coordinate plane, a horizontal line runs parallel to the x-axis.

A coordinate plan has an x-axis and y-axis. All points on a horizontal line have the same value for the y coordinate in their ordered pair, (x,y). The opposite is true for a vertical line. A vertical line runs parallel to the y-axis, and points on the line contain the same value for their x coordinates. The slope of a horizontal line is zero, meaning the line does not rise or fall.

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