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

The equation 3 j 6 = 9 can be shown on a function machine by writing out the functions that have been applied to j in the order they happened. BIDMAS means multiplications happen before subtractions.

The Loewner differential equation, introduced by Charles Loewner in 1923, describes the time evolution of a family of conformal (angle-preserving) functions defined on subsets of the complex plane.