Linear equations can be shown on a graph. Find out how to create one in this Bitesize KS3 maths video.

How to Find the Slope of a Line on an Excel Graph. In math and statistics, you may occasionally need to calculate the slope of a line generated by coordinates in the (x,y) format.

The top part of that image is the equation itself. The bottom part is a graph of the equation, which, as you can see, is exactly the same. To be fair, this equation cheats a little bit.

The equations are used in calculus to describe relationships among one or more variables. A solution to any series of equations can be found by graphing both equations and finding out where they meet.