Question

The first four terms of a sequence are shown below.
9, 5, 1, -3

Which of the following functions best defines this sequence?
f(1) = 9, f(n + 1) = f(n) - 4; for n ≥ 1

f(1) = 9, f(n + 1) = f(n) + 4; for n ≥ 1

f(1) = 9, f(n + 1) = f(n) - 5; for n ≥ 1

f(1) = 9, f(n + 1) = f(n) + 5; for n ≥ 1
(Will medal and fan)

Answer 1

D is cotrrect right?