multiple lines / curves on scatter chart?

Hello
I'm using scatter charts for flow rate analysis, example my y axis is 0 - 100 psi, my x axis is 0-1000 gpm. I plot flow rates at 0 flow, 100% flow and 150% flow with corresponding psi readings to get my curve. On the chart I want to have the data the manufacturer of the pump provides along side of real world flow tests and also the results of perhaps the previous years results. Can I do this?

Thanks
Dave

OK figured that one out....'series' dummy! I was expecting a bunch of replies telling me how obvious it was but I see there were more important issues. I do have another problem though so I will make a new thread.

Regards
Dave