Use Contour Plot and Surface Plot when you have a stored model and want to plot the relationship between a fitted response and two continuous variables. A contour plot displays a two-dimensional view in which points that have the same response value are connected to produce contour lines. A surface plot displays the three-dimensional relationship in two dimensions, with the variables on the x- and y-axes, and the response variable (z) represented by a smooth surface.
To learn more, go to Contour Plot and Surface Plot in the using fitted models area.