To analyse braking data (quadratic relationship), transforming this data to linearise and full linear analysis of the transformed data.
Explanatory variable, bivariate
About the Lesson
About the activity: Data is given for braking distances at given speeds. The plot reveals a quadratic relationship. Substitution into the quadratic regression is performed, then the data is transformed using an x-squared transformation to create a linear relationship (for courses not requiring this technique students can be given the transformed data). A full analysis including residual patterns and the use of the regression equation is done.