You must perform a two-way ANOVA in Minitab Express before you can use this analysis. To create the factorial plots, Minitab Express uses the most recent two-way ANOVA model that you fit for the response.
For example, researchers at a motor vehicle bureau want to illustrate their two-way ANOVA results that find a significant interaction effect between driver experience and road type on the number of steering corrections.
Factorial plots create graphs with fitted means from a two-way ANOVA model. If you did not perform a two-way ANOVA in Minitab Express, you do not have a model to use. You can create Main Effects Plot and Interaction Plot with data means instead of fitted means.
For more information, go to Comparison of data means and fitted Means.