Plotting points on a straight line – https://www.transum.org/Software/SW/Starter_of_the_day/Students/Plotting_Graphs.asp
Match the equation to the graph – https://www.transum.org/Software/GraphMatch/
Find the slope of a graph – https://www.mathgames.com/skill/8.41-find-the-slope-of-a-graph
Find the gradient of a straight line – https://www.transum.org/software/GraphMatch/Gradient.asp