Which relation is a function?

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A. (1,0). (3.0), (1, 1), (3, 1) (1, 3)

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B. (1, 1), (2.2), (3, 3), (4, 4), (5,8)

C. (2, 7). (6.5), (4,4), (3, 3), (2.1)

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D. (9. - 3). (9,3), (4, - 2). (4, 2). (0,0)

1) Triangle ABC is a similar to triangle QRS by the AA Similarity Postulate Also, m∠A=32° and m∠S=102° what is m∠B? 2) Triangle ABC is similar to triangle XYZ by the AA Similarity Postulate. Also m∠A=39° and m∠C=24°. What is m∠Y?

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