But how do you come up with a function to fit data? The basic idea is to create a quadratic function and vary the parameters such that the deviation of the actual data from the function is minimized.

Wendy B. Sanchez, David M. Glassmeyer, Connecting Parabolas and Quadratic Functions, The Mathematics Teacher, Vol. 110, No. 5 (December 2016/January 2017), pp. 380-386 ...

The quadratic function has two roots, and if you imagine the two roots on a number line, you’ll see that they are symmetric about x = 0. And when you remember that the graph of a quadratic function is ...

Then a positive definite quadratic function in normal vectors is defined as XLX' where L is a symmetric positive definite (p.d.) matrix with real elements. In the analysis of variance, such functions ...

Revise how to sketch a quadratic function. BBC Bitesize Scotland revision for SQA National 5 Maths.

WATCH: How to draw a quadratic graph A quadratic function can be drawn as a parabola on a graph. Find out how to plot the graph in this Bitesize KS3 maths video.