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Select ALL sets that are functions:
(-2,1), (0.5), (-6, 4), (-2,3)
(-6, 4), (8,3), (2, 2). (10,-5)
(-2,1), (0.5), (-6, 4), (-2, 1)
(5, 16), (6, 20), (7, 25), (9, 10)

Respuesta :

oystersawce
2nd and 4th are functions

an x value in a set of functions can only have one y value. however, a y value can have infinite amount of x values

in the 1st and 3rd set, the x value of -2 has 2 y values

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