Thread: how do you indentify whether each function is a quadratic function

1) y=3-x2 2)y=2-2x+2

Originally Posted by Shynita Matthews

1) y=3-x2 2)y=2-2x+2

It's a quadratic function if x (the independent variable) appears with a square (but not with a higher or lower power).

Example: y = 1 + 3x^2 is quadratic (I'm using ^2 to indicate the squaring, just as you would do it on a TI-86). y = x^3 - 4x^2 is not a quadratic function (it also has a third order term). y = 3x + 4 isn't quadratic either.

Hope this helps. This is Algebra I I guess? My son just did this 2 classes ago in his math class.