Five friends go to a store to buy candy. The candy bars they want cost $1.20 each. This relation of the total cost of the candy bars to the amount of candy bars purchased can be written as y = 1.20x. The domain of the relation is 1, 2,5, 6, and 9. What is the range?

Me with this assignment ! i only partially understand, so explain. also it's a work sample. at the championship bike race, steve and paula were fighting for first place. steve was 175 feet ahead of paula and had only 300 feet left to go. he was very tired and was going only 9 feet per second. paula was desperate to catch up and was going 15 feet per second. who won the bike race and by how far did she/he win?