Is the following relation a function?

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asked Jul 2, 2023 182k views

2 Answers

Kevin Keane · Answer 1 · 2023-07-09T14:14:26+0000

A circle is a set of points in the plane. A function is a mapping from one set to another, so they're completely different kinds of things, and a circle cannot be a function.

Is the following relation a function?

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