Question

Algebra I help!!!!
Will fan and/or medal
The first four terms of a sequence are shown below.
9, 5, 1, -3
Which of the following functions best defines this sequence?
a. f(1) = 9, f(n + 1) = f(n ) - 4; for n ≥ 1
b. f(1) = 9, f(n + 1) = f(n ) + 4; for n ≥ 1
c. f(1) = 9, f(n + 1) = f(n ) - 5; for n ≥ 1
d. f(1) = 9, f(n + 1) = f(n ) + 5; for n ≥ 1

Answer 1

the answer is a

Answer 2

thank you