SOLUTION: Verify that the function y-x^2+2 has a y-axis symmetry. This is the question. Are you testing for symmetry by replacing x with -x or are you simply finding the axis of symmetry

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Question 741342: Verify that the function y-x^2+2 has a y-axis symmetry.
This is the question. Are you testing for symmetry by replacing x with -x or are you simply finding the axis of symmetry by using the formula -b/2a and letting the equation equal zero.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Verify that the function y-x^2+2 has a y-axis symmetry.
This is the question. Are you testing for symmetry by replacing x with -x or are you simply finding the axis of symmetry by using the formula -b/2a and letting the equation equal zero.
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Use the f(x) and f(-x) test for y-axis symmetry.
Every parabola has a value for x = -b/(2a), but not very parabola
is symmetric to the y-axis.
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Cheers,
Stan H.