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Mathematics, 16.12.2020 20:10 ayoismeisjuam

Does the set of ordered pairs {(5,13), (6,12), (7,11) (9,9) (10,11)} define a function? A: No, because 9 is paired with itself.
B: Yes, because each input has only one output.
C: No, because there is no ordered pair in the set where x = 8.
D: No, because 2 different x-values are paired with 11

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