Sam is a waiter at a local restaurant where he earns wages of $6 per hour. Sam figures that he also earns about $2.50 in tips for each person he serves. Sam works 4 hours on a particular day.

If n represents the number of people Sam serves that day, which of the following functions could Sam use to figure E, his total earnings for the day?
E(n) = 2.5n
E(n) = 4n + 10
E(n) = 2.5n + 24

Question

Sam is a waiter at a local restaurant where he earns wages of $6 per hour. Sam figures that he also earns about $2.50 in tips for each person he serves. Sam works 4 hours on a particular day.

If n represents the number of people Sam serves that day, which of the following functions could Sam use to figure E, his total earnings for the day?
E(n) = 2.5n
E(n) = 4n + 10
E(n) = 2.5n + 24