Learn how to calculate the equation of a line from a graph, work out the gradient from an equation, and visualise intercepts with this step-by step guide.

Learn how to calculate the equation of a line from a graph, work out the gradient from an equation, and visualise intercepts with this step-by step guide.

The author of this work has therefore wisely begun with the notions of velocity and gradient of a curve before introducing dy/dx as the instrument for measuring them.