A pilot takes a taxi from the airport to the hotel. The taxi driver charges a $2.50 initial charge plus $2.65 per mile. Which equation can be used to find y, the total cost of the trip, if x represents the number of miles of the trip?
a y = 2.65(x + 2.50)
b y = 2.65x-2.50
c y = 2.50x+2.65
d y = 2.65x+2.50