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10 July, 03:33

Which of the following sets represents a function?

{ (3,5), (-1, 7), (3, 9))

{ (1, 2), (3, 2), (5, 7))

{ (1, 2), (1, 4), (1, 6) }

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  1. 10 July, 05:04
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    B. { (1, 2), (3, 2), (5, 7))

    Explanation - Set B represents a function because all the first elements are different. While in the rest of the given sets, the first elements are repeated. In set A, 3 is repeated twice in the first element and in set C, 1 is repeated all the tree times in the first element.

    While drawing it in a graph, one line may cross the other line which says that the given set is not a function. Such type of test is called as vertical line test.
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