Learn how to plot coordinates and create straight line graphs to show the relationship between two variables. Also, plot graphs that contain a negative coefficient of x.

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.

To do so, click the Line tool and then hold down the Shift key while you click and drag to insert the line. Doing so forces Excel to draw a straight line between the two clicked points.