Which function gives the correct recursive formula for the sequence?

Question

2, 7, 12, 17, 22, 27
Responses

a1 = 5; an = an −1 +2
a1 = 5; an = an −1 +2

a1 = 7; an = an−1 + 2
a1 = 7; an = an−1 + 2

a1 = 2; an = an −1 + 7
a1 = 2; an = an −1 + 7

a1 = 2; an = an −1 +5

Answer 1

a1 = 2; an = an −1 + 5