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| Question 964123:  which of the following relations is a function?
 a. {(5, 11), (6, 2), (1, 2), (6, 7), (1, 3)}
 b. {(1, 11), (6, 2), (3, 4), (5, 7), (8, 11)}
 c. {(1, 11), (6, 2), (6, 4), (5, 7), (8, 12)}
 d. {(1, 5), (6, 2), (3, 4), (5, 7), (6, 12)}
 Answer by Fombitz(32388)
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