A Movie Theater Has Been Charging $\$ 9.00$ Per Person and Selling About 300 Tickets on a Typical

Short Answer

A movie theater has been charging $\$ 9.00$ per person and selling about 300 tickets on a typical weeknight. After surveying their customers, the theater estimates that for every $\$ 1$ that they lower the price, the number of moviegoers will increase by 40 per night. Find the demand function and calculate the consumer surplus when the tickets are priced at $\$ 4$ .