Hello from MrBillDoesMath!
Answer: Choice A, -6n + 25
Discussion:
I started by substituting n = 1 in each the of f(n)'s listed. Only the first one (choice A) produced the value of 19. (So we can ignore choices B, C, and D) Let's just verify the value of choice A f(n) other values of n:
For choice A:
f(n) = -6n + 25
f(1) = -6 *1 + 25 = -6 + 25 = 19
f(2) = -6*2 + 25 = -12 + 25 = 13
f(3) = -6*3 + 25 = -18 + 25 = 7
f(4) = -6*4 + 25 = -24 + 25 = 1
f(5) = -6*5 + 25 = -30 + 25 = -5
These numbers match the first five terms given in the problem.
Thank you,
MrB
