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Math Question?
Is any integer (+/-/0) a plausible answer? I am aware that the coefficient of x^2 defines the concavity of the parabola but I'm not sure. Thank you.

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- RealProLv 72 years agoFavorite Answer
Depending on the definition, it is most likely all integers EXCEPT 1.
Because for 1 you get a straight line and that doesn't open anywhere.
Source(s): A parabola is most often defined as y = Ax^2 + Bx + C, A not equal to 0. - Jeff AaronLv 72 years ago
Any real number except 1 is a valid answer, whether it's an integer or not.
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