What’s this I need help cause am doing my semester exam

The graph of a line gets what as the value of the slope gets bigger

Which of the following expressions is equal to 2x^2+8

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?