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Mathematics 19 Online
OpenStudy (anonymous):

how do I know when a parabola is or isn't a function?

OpenStudy (zale101):

By the vertical test, you can determine which functions are and not a function.

OpenStudy (anonymous):

and a vertical test is when...?

OpenStudy (zale101):

The vertical line test determines if the graph passes vertical lines only 1, but not twice. For example, if we have a parabola. |dw:1441659261950:dw|

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