Answer:
D
Step-by-step explanation:
The n th term of an arithmetic sequence in functional notation is
f(x) = a₁ + (x - 1)d
where a₁ is the first term and d the common difference
d = - 7 - (- 5) = - 7 + 5 = - 2 and a₁ = - 5, thus
f(x) = - 5 - 2(x - 1) = - 5 - 2x + 2 = - 2x - 3 → D
