Is the relation ${(0, 3), (0, -2), (0, 1)}$ a function?

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Answer 1 · 2015-05-28T18:25:44

To be a function, a single value in the Domain can not map into multiple values in the Range.

In the given set:
the Domain is ${0}$ and
the Range is ${ 3, 2, 1}$

This is not a function.

Is the relation {(0, 3), (0, -2), (0, 1)}{(0, 3), (0, -2), (0, 1)} a function?