The number P of British pounds you can getfrom a bank is a linear function of thenumber D of American dollars you pay. AnAmerican tourist arriving at Heathrow airport in England went to abanking window at the airport and gave theteller 249 American dollars. Shereceived 93 British pounds in exchange. In this exercise,assume there is no service charge for exchanging currency.

(a) What is the rate of change, or slope,of P with respect to D?(Note: You need two values to calculate slope, butyou were given only one. If you think about it, you know the othervalue. How many British pounds can you get for zero Americandollars? Round your answer to five decimal places.)
pounds per dollar

Explain in practical terms what this number means.

This means each dollar is worth pound.

(b) A few days later, the American tourist went to a bank inPlymouth and exchanged 110 American dollars for Britishpounds. How many pounds did she receive? (Round your answer to twodecimal places.)
£

(c) Upon returning to the airport, she found that she still had£12.04 in British currency in her purse. In preparation forthe trip home, she exchanged that for American dollars. How muchmoney, in American dollars, did she get? (Round your answer to twodecimal places.)