SOLUTION: Linear or nonlinear? Why? Y=x2-5

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Question 1059180: Linear or nonlinear? Why? Y=x2-5
Answer by math_helper(2461) About Me  (Show Source):
You can put this solution on YOUR website!
If that is "x squared" +y+=+x%5E2+-+5+ then it is nonlinear. In order for a function to be linear, any 'x' appearing must have exponent exactly equal to 1.
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Nonlinear examples:
+y+=+x%5E1.5+
+y+=+x+%2B+x%5E2
+y+=+x%5E-2+
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Linear examples:
+y+=+%28x+%2B+3%29+%2B+%287+%2B+13x%29+
+y+=+7+ This can be thought of as +y+=+0%2Ax+%2B+7+