I've created a multiple regression predicting 1 DV from 4 IVs (all mean-centered) + 1 interaction term between two of the IVs. The interaction term is significant.
I'd like to get a nifty graph comparing the effect of one of the variables included in the interaction on the DV at particular values (say, $\pm1 SD$) of the other variable (i.e., the moderator).
I understand how to do this when I only have 3 IVs (predictor, moderator, and interaction), but how can I do this when I have 2 other IVs not involved in the interaction?
Let me know if additional info or exact numbers will help.