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| Math Central | Quandaries & Queries |
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Question from Aubrey, a student: Hi... I'm supposed to "state the domain/range of each of the following relations" and it's totally not making sense... Examples: {(x,y) : x = square root of y} {(x,y) : y = x + 1, x is some even integer} Thanks in advance!! Aubrey |
Aubrey,
The domain is the set of possible x values,
the range is the set of possible y values.
Note also that while 0 and positive numbers have square roots, negative numbers don't.
-Robert
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