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Math Help - relations and functions

  1. #1
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    relations and functions

    determine the domain and range of the relation and state if it a function or not.

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

    i dont remember ever learning this in class but it is on my finals review.
    anyone care to explain how to do it? and what domain/range means?

    thanks.
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  2. #2
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    Given a set of ordered pairs (that is a relation), the domain of the relation is the set of first terms; the range (the image) is the set of second terms. If two pairs have the same first term then relation may be a function.
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