Revise how to work out the equation of a straight line using coordinates and the gradient, and vice versa. BBC Bitesize Scotland SQA National 5 Maths.

Learn and revise how to plot coordinates and create straight line graphs to show the relationship between two variables with GCSE Bitesize OCR Maths.

The symmetrical cubic equation was described by Alfred Clebsch in 1871 and is remarkable as it has exactly 27 straight lines that lie flush to its surface.