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Mathematics 21 Online
OpenStudy (anonymous):

Please Help! Which of the following sets represents a function? A.(1,1) (2,1) (3,1) (4,1) B.(1,1) (1,2) (1,3) (1,4) C.(1,1) (2,1) (2,2) (3,1) D.(2,1) (2,2) (3,2) (4,2)

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