2 Answers

Kaey · Answer 1 · 2019-12-07T23:09:41+0000

the top one, use the vertical line test and if their are more than two points on the vertical line when testing the points then the relation is not a function. Which tells you that the last three are not a function.

Tuss · Answer 2 · 2019-12-12T07:44:46+0000

The answer is number 1 since a function can't have x repeated. all the other ones have a single x giving 2 numbers. if this happens once it is no longer a function.

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