SOLUTION: Decide whether or not the equation defines y as a function of x. x=y^2-5

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Question 460394: Decide whether or not the equation defines y as a function of x.
x=y^2-5
Found 2 solutions by robertb, richard1234:
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
If x = 4, then 4+=+y%5E2+-+5 ==> y%5E2+=+9 ==> y = 3, -3. The points (4,3) and (4, -3) are on the graph of the equation. Therefore y is not a function of x.

Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
That defines x as a function of y, not the other way around.