SOLUTION: Determine whether the equation defines y as a function of x. x2 + y2 = 1

Question 634824: Determine whether the equation defines y as a function of x.
x2 + y2 = 1

Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Solve for y to get

$y = \pm \sqrt{1-x^2}$

Because we got that "plus/minus", this means that each input produces 2 outputs...which means that y is NOT a function of x.

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