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1. Six NEFs have quadratic variance functions (QVF) in which the variance of the distribution can be written as a quadratic function of the mean.

### ConcaveUpDw('CONCAVE','-Abz-');

1. This yields the classic “bell curve” shape (provided that a < 0 so that the quadratic function is concave).

### GraphingUpDw('GRAPHING','-Abz-');

1. The first formula above yields a convenient expression when graphing a quadratic function.

1. You can think about a quadratic equation in terms of a graph of a quadratic function, which is called a parabola.
2. A quadratic regression, for example, uses a quadratic function (second-degree polynomial function) to produce a parabola of best fit.
3. The derivative of a cubic function is a quadratic function.

### CategoriesUpDw('Categories','-Abz-');  Short phrases about "Quadratic Function"   Originally created: April 04, 2011.   Please send us comments and questions by this Online Form   Please click on to move good phrases up.