Construct a residual plot and use it to assess the appropriateness of fitting a linear model to the data.

gm-u3-t2-s1-d3

Interactive

Residual plots assess the linear fit

demo

Switch linear, curved and fan data — the residual plot is random only when a straight line is appropriate.

Open fullscreen →

Want a different take?

Already have one and want another angle on this point? Describe what students should notice. Requests are read and acted on.