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.

Revise how to plot a linear equation graph. Learn how to read x and y coordinates from a graph in this BBC Bitesize maths KS3 guide.

The graphing mode is the first open-sourced suggestion to be chosen. It was Microsoft engineer Dave Grochocki’s idea, who suggested that students could use the graphing feature to study algebra.