Capture relationships between data sets by graphing linear equations in Microsoft Excel 2007. Linear equations allow you to predict values within your data set and view the overall trend.

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

One tool that practitioners have at their disposal, and that could help explain the autism spectrum in a non-linear way, is a pie chart, similar to the wheel of life used by some life coaches.