Probably newbie question, if so I’ll apologize in advance.

I’m looking to plot math expressions, either y=f(x), z=f(x,y) or w=f(x,y,z). Ideally I’d like to specify the functions, give it ranges for the domain variables, and get a plot. When this is done, I’ll then need to plot individual values on the same plot. My question is on the first topic (plotting functions) I believe I know how to do the second.

thanks,

-eric