Tell me, why is x = |y| NOT a function?

Also, would y = |x| be a function? If so, why?

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- Aug 31st 2009, 06:09 AMsharkmanDefine Function
Tell me, why is x = |y| NOT a function?

Also, would y = |x| be a function? If so, why? - Aug 31st 2009, 06:17 AMe^(i*pi)
- Aug 31st 2009, 07:44 AMsharkmanSo...
- Aug 31st 2009, 08:34 AMMatt Westwood
Because you can plug in any value of x and you can be guaranteed to get exactly one value of y out the other end. That's what defines a function: every value of x has exactly one value of y.

- Aug 31st 2009, 08:08 PMsharkmanok...