October 4, 2015

Homework Help: Pre-Calculus

Posted by Peter on Thursday, August 9, 2012 at 12:48am.

Determine whether the equation represents y as a function of x.

|y| = 4 - x

If I plug in 5, then I get -1, but it also means 1. Does that mean y has 2 values which means that it is not a function?

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