Body fat

This page and the following pages in the section illustrate the ideas of linear models and least squares when there are two explanatory variables, using rotating 3-dimensional diagrams.

This diagram shows three variables in a 3-dimensional scatterplot. Drag the centre of the diagram to display the 3rd variable.

Click crosses to draw arrows showing how the position of the crosses depend on the values of the three variables.

Percent body fat, abdomen circumference and height from a group of 252 men.