"Model Graphs" gives a clear picture of how the response will behave
at different levels of factors at a time through predicted response equation with individual coefficients:
1. Interaction Plot indicates Interaction occurs with 2 NON-PARALLEL CROSS LINES, indicating the effect of one factor depends on
the level of the other factor.
2.
2D PLOT OF TWO INDEPENDENT FACTORS Vs one response factor to predict the response at different levels of factors, while holding the magnitude of response and other factors as constant.
3.
3D SURFACE PLOT OF TWO INDEPENDENT FACTORS
Vs one response factor to explore the effect of changing levels of factors on the response, while holding the magnitude of response & other factors constant.
4.
4D PLOT OF THREE INDEPENDENT FACTORS
AT A TIME Vs one response factor at different levels of factors, while holding the magnitude of response and other factors as constant.