I am trying to create a singe Y by X graphic comparing linear regressions based on equations. The intercepts of the equations are the same but the slopes are different. I fitted these equations using Proc Mixed in SAS, and thought that I could easily plot these using JMP SAS. When I use "Analyze, Fit Y by X", it allows me to set the intercept and slope for the fitted equation for one data group, but it doesn't allow me to set the slopes for the other lines. Fit Y by X seems to only fit one equation, but I need to fit several different slopes for the lines associated with different data groups.

I've also looked at "Graph, Graph Builder" but approach that does not allow me to set different slopes for different data groups within the same graph either.

Is there a way for me to make this graphic in JMP SAS showing the fitted model equation with different slopes but the same intercept for these data group comparisons?