A manufacture has been selling 1900 television sets a week at 480 each. A market survey indicates that for each 11 rebate offered to a buyer, the...

A manufacture has been selling 1900 television sets a week at 480 each. A market survey indicates that for each 11 rebate offered to a buyer, the number of sets sold will increase by 110 per week.a) Find the demand function p(x), where x is the number of the television sets sold per week.