Question

Given an arithmetic sequence in the table below, create the explicit formula and list any restrictions to the domain. (2 points)

n an
1 9
2 3
3 -3

1) an = 9 - 3(n - 1) where n ≤ 9

2) an = 9 - 3(n - 1) where n ≥ 1

3) an = 9 - 6(n - 1) where n ≤ 9

4) an = 9 - 6(n - 1) where n ≥ 1