Which letter represents the equation for the table of values? f(x) = 5(13)x B. f(x) = 3(15)x C. f(x) = 3(5)x D. f(x) = 5(3)x

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?