Revise how to recognise and determine the equation of a quadratic function from its graph. BBC Bitesize Scotland revision for SQA National 5 Maths.

Quadratic equations are polynomials, meaning strings of math terms. An expression like “x + 4” is a polynomial. They can have ...

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

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.

The quadratic formula learned by generations of math students is difficult to remember, but it can be used to solve quadratic equations where y = 0.