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. BBC Homepage ...

Revise how to plot a linear equation graph. ... is a number which is a measure of the steepness of the line. ... (0, 3), (1, 1), (2, -1), and (3, -3).

Learn how to make everything from basic line graphs to racing bar charts — all interactive and easily animated — with the echarts4r R package.