Airline Profit The table gives the price, in dollars, of a round-trip ticket from De...

Airline Profit The table gives the price, in dollars, of a round-trip ticket from Denver to Chicago on a certain airline and the corresponding monthly profit, in millions of dollars, for that airline.

a. Explain why a quadratic model is more appropriate for the data than a log or exponential model.

b. Find a quadratic model for the data.

c. Why doesn’t the airline profit increase as the ticket price increases?

d. Report the ticket price (to the nearest dollar) at which the airline will begin to post a negative profit (that is, a net loss).