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Horizontal
See It in Action
Two examples of the idea done right—and one common look-alike that is not right.
EXAMPLE
EXAMPLE
NON-EXAMPLE
Definition
Horizontal typically refers to a line that runs left to right on a graph. A horizontal line has a constant y-coordinate for all values of x. This means that no matter what value you choose for x, the value of y remains the same. The equation of a horizontal line can be written in the form y = k, where k is a constant. For example, the line y = 3 is horizontal and passes through the point (0, 3), as well as all other points where the y-coordinate is 3.
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