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Concept Version 9
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One-to-One Functions

Parabola Graph

Parabola Graph

The graph of the function $f(x)=x^2$ fails the horizontal line test and is therefore NOT a one-to-one function.  If a horizontal line can go through two or more points on the function's graph then the function is NOT one-to-one.

Source

    Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:

    "One-to-One graph.jpg."
    https://www.desmos.com/calculator Desmos CC BY-SA 3.0.

Related Terms

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