Using a combo box to change chart data

[Tcurtis]

Hi, I am new to Access and need to build a chart that change with a user input. I have a combo box of Plants: Plant 1, Plant 2, Plant 3 and have a chart with a total amount of usage from those plants. I need the user to have the ability of selecting a Plant and the chart change to show that plants usage over the past 12 months.
If someone knows of any good tutorials on Access, I would really appreciate that also.

Thanks