A law firm is going to designate associates and partners to a big new case. The daily rate charged to the client for each associate is $400 and the daily rate for each
partner is $800. The law firm designated twice as many partners as associates to the
case and was able to charge the client $8000 per day for these lawyers' services.
Graphically solve a system of equations in order to determine the number of
associates assigned to the case, x, and the number partners assigned to the case, y.