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 most important part of any equation is the equals sign at its heart. Those two horizontal lines tell us that when we change one thing, we’ll see a corresponding change in another, apparently ...