Revise how to work out the gradient of a straight line in maths and what formula to use to calculate the value change in this Bitesize guide.

A linear equation is drawn as a straight line on a set of axes. To draw the graph we need coordinates. We generate these coordinates by substituting values into the linear equation.

If pinpoint accuracy is not important, you can simply draw a curve shape to create a graph. Excel offers options for drawing a variety of shapes with circles, curves and straight lines. To draw a ...