Hot Dog Sales - Rental of Barbeque The Social Justice Club is going to rent a mammoth barbeque to cook the hot dogs for the hot dog sale. After contacting three rental companies in town, you have found out that each one will deliver and pick up their barbeque. The cost of propane is included in the rental. The rental costs are indicated below.

Rental A: $15/h

Rental B: $5/h + 50

Rental C: $9/h + 20

1)Write an equation that models the rental cost, C, for each company.
2)Graph all three models onto the same set of coordinate axis.
3)Which rental company should be chosen if you use the barbeque during lunch (11:05 - 12:30) and keep the barbeque to continue sales during the football game that will end about 4:30? Justify your answer.
4)Which rental company should be chosen if your school lunch hours run from 11:05 - 12:30? Justify your answer.
5)Which rental company should be chosen if your school returned the barbeque the following day? Justify your answer.