Question 528826
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See if any of the *[tex \Large x]-coordinates in any of the ordered pairs are equal.  If you have any pair of ordered pairs such that the *[tex \Large x]-coordinates are equal but the *[tex \Large y]-coordinates are not equal, then the relation is NOT a function.  Otherwise, it is a function.

John
*[tex \LARGE e^{i\pi} + 1 = 0]
My calculator said it, I believe it, that settles it
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