HELP! Do not know what kind of graph to use?

They can be added to the same graph, although as you can see this one graph is really three graphs glued together in one frame.

Another option would be to create a 3D surface graph, sample attached. That gives a better presentation when you have this many variables.

What do you want to emphasize? Do you want to show any kind of trend or correlation?

I am trying to figure out if there is similarities or patterns with burial types related to age or *** or both.