Essential revision or learning for a wealth of disciplines like architecture, physics, engineering or design. Understanding the qualities of circles, lines and cones together with a thorough explanation of vectors, provide an excellent foundation to further study.

# Equations of straight lines

In this unit the equation of a straight line is established using either information about its gradient together with the co-ordinates of a point on the line, or alternatively the co-ordinates of two different points on the line. The different ways of expressing the final equation are explored. Video tutorial 34 mins.