Linear correlation: how well a bivariate (two-variable) set of data relates in a straight line. In other words, if you were to plot the bivariate data on a scatter plot and then draw the best straight line that comes as close to as many points as possible, the correlation would tell you how well that line represents the real data.
(when i say best straight line, i mean the one that has the least distance between it and the actual data points on the graph, so if you reaaaaallly want to, you could calculate the distance from each point and multiple lines to see which is the best fitting. I just let my Excel do it for me.)
Watch the video before you view the slide show!
A video talking you through the idea of linear correlation
