Profit = revenue - expenses f(x) = 4x - 1200...with x being the number of tickets sold
the domain is going to be ur x value...which is the number of tickets sold. And being that there is only 500 seats, there can be only 500 tickets sold. So the domain is all the integers (it has to be integers because ur not gonna sell half a ticket)....all the integers from 0 to 500.
