In mathematics, polynomial functions, or polynomials, are an important class of simple and smooth functions. Here, simple means they are constructed using only multiplication and addition. Smooth means they are infinitely differentiable, i.e.
Quadratic function is the simplest polynomial function that is non-linear. In this tutorial, you will first learn to distinguish quadratic function from quadratic equation and quadratic formula .
Noisy (roughly linear) data is fitted to both linear and polynomial functions. Although the polynomial function passes through each data point, and the linear function through few, the linear version is a better fit.
Quadratic. Fits a second-order polynomial function to the points in the 3D scatterplot.
Babbage's difference engine was a special-purpose machine for computing the values of certain polynomial functions and was the forerunner of his analytical engine.
 See also: Data mining, Regression, Generalization, Estimation, Exponential distribution
  
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