Horizontal line test
In mathematics, the horizontal line test is a test used to determine whether a function is injective (i.e., one-to-one). == In calculus == A horizontal line is a straight, flat line that goes from left to right.
In mathematics, the horizontal line test is a test used to determine whether a function is injective (i.e., one-to-one). == In calculus == A horizontal line is a straight, flat line that goes from left to right.
In mathematics, the horizontal line test is a test used to determine whether a function is injective (i.e., one-to-one). == In calculus == A horizontal line is a straight, flat line that goes from left to right.
Source: Wikipedia "Horizontal line test" · CC BY-SA 4.0
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