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Mathematics 15 Online
OpenStudy (anonymous):

what is the vertical lines test and the horizontal line test

OpenStudy (lgbasallote):

it is basically drawing vertical lines all over your graph...if one vertical line intersects two points of your graph, then the graph is not a function....i do not know the purpose of the horizontal line test, however.

OpenStudy (anonymous):

In essence, if you find two values of Y (function) for same value of X, then the function is not uniquely defined.

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