Acharity organization had a fundraiser where they sold each ticket for a fixed price. after selling 200200200 tickets, they had a net profit of \$12{,}000$12,000dollar sign, 12, comma, 000. they had to sell a few tickets just to cover necessary production costs of \$1{,}200$1,200dollar sign, 1, comma, 200.
let yyy represent the net profit (in dollars) when they have sold xxx tickets.