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horizontal line
[horizontal line|horizontal line] A horizontal line is defined by an equation in the form f(x) = b, where the slope is zero and y = c with c as a constant.
Definition
horizontal line A horizontal line is defined by an equation in the form f(x) = b, where the slope is zero and y = c with c as a constant.
Mechanism
horizontal line The horizontal line shown in [link] intersects the graph of the function at two points. Any horizontal line intersects the graph in at most one point, indicating the graph represents a one-to-<a href='/en/entity/one-function'>one function</a>.
Effects
horizontal line A constant linear function results in a horizontal line graph. The horizontal line test determines if a graph represents a one-to-<a href='/en/entity/one-function'>one function</a>.