Understanding Proportional Relationships

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Which of the following sets of ordered pairs represents a function? {(1, 2), (2, 3), (1, 4)}, {(2, 5), (3, 6), (4, 7)}, {(1, 2), (2, 2), (3, 2), (2, 3)}, {(1, 1), (1, 2), (2, 3)}

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{(2, 5), (3, 6), (4, 7)}

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7

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6

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3

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Identify the set of ordered pairs that does NOT represent a function: {(1, 2), (2, 3), (3, 4)}, {(1, 2), (2, 2), (3, 2)}, {(1, 2), (1, 3), (2, 4)}, {(2, 5), (3, 6), (4, 7)}

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{(1, 2), (1, 3), (2, 4)}