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Which relations are functions select all that apply? Help question for 30 points

Which relations are functions select all that apply? Help question for 30 points-example-1

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Answer:

A and C show relations that are functions. In these relations, each x-value corresponds to exactly one y-value. B is not a function because the x-value -4 corresponds to two y-values. D is not a function because it fails the Vertical Line Test.

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