Use Minitab's contour plot to help you visualize the effects of covariates that are in your general linear model. This plot shows how a response variable relates to two continuous variables based on a model equation while any additional variables are held constant.

These plots are useful for establishing desirable response values and operating conditions.

Catalytic Reaction Data : Plots with Two Variables

A chemical manufacturer is trying to maximize the yield of a catalytic reaction. The researchers study the effects of time (Time) and temperature (Temp) on the yield (Yield) of the reaction..

Cleaning Efficiency Data : Plots with more than Two Variables

An experimenter wants to study the effects of washing pressure (Pressure), washing time (Time), and the concentration of detergent (Conc) on cleaning efficiency. The experimenter is trying to determine the settings that maximize cleaning efficiency.

Data: Cleaning_model.MTW, Reaction_model.MTW (available in the Sample Data folder).