Answer:
Its the first choice.
Step-by-step explanation:
an = the nth term. so:
a1 = 6(1) + 1 = 7
a2 = 6(2) + 1 = 13
a3 = 6(3) + 1 = 19
The common difference is 6.
7, 13, 19, 25, 31
aₙ = 6n + 1
n = 1: a₁ = 6 × 1 + 1 = 6 + 1 = 7
n = 2: a₂ = 6 × 2 + 1 = 12 + 1 = 13
n = 3: a₃ = 6 × 3 + 1 = 18 + 1 = 19
n = 4: a₄ = 6 × 4 + 1 = 24 + 1 = 25
n = 5: a₅ = 6 × 5 + 1 = 30 + 1 = 31
