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12 May, 21:01

Which of the following relations is a function?

{ (5, - 7), (4, 6), (-3, 8), (5, 9) }

{ (8, - 4), (-4, 8), (-4, - 8), (-8, 4) }

{ (2, 3), (-2, 3), (3, 2), (-3, - 2) }

{ (9, - 1), (-1, 9), (9, 2), (2, - 1) }

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  1. 12 May, 21:04
    0
    The first one IS a function. The rest are not.
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