PLEASE HELP! URGENT! WILL GIVE BRAINLIEST Given an arithmetic sequence in the table below, create the explicit formula and list any restrictions to the domain.

n an
1 9
2 3
3 −3

A. an = 9 − 3(n − 1) where n ≤ 9
B. an = 9 − 3(n − 1) where n ≥ 1
C. an = 9 − 6(n − 1) where n ≤ 9
D. an = 9 − 6(n − 1) where n ≥ 1

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 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 ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18