Which relation is a function?

{ (4, 2), (3, 3), (2, 4), (3, 2) }

{ (1, 4), (2, 3), (3, 2), (4, 1) }

{ (1, 2), (2, 3), (3, 2), (2, 1) }

{ (1, - 1), (-2, 2), (-1, 2), (1, - 2) }

Question

4 January, 22:43

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Answers (1)

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Osvaldo Brady · Answer 1

It would be your second option. It's the only one that passes the vertical line test.

Which relation is a function?{ (4, 2), (3, 3), (2, 4), (3, 2) }{ (1, 4), (2, 3), (3, 2), (4, 1) }{ (1, 2), (2, 3), (3, 2), (2, 1) } { (1, - 1), (-2, 2), (-1, 2), (1, - 2) }