The first four terms of a sequence are shown below.

9, 5, 1, -3

Which of the following functions best defines this sequence? (4 points)

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

Question

The first four terms of a sequence are shown below.

9, 5, 1, -3

Which of the following functions best defines this sequence? (4 points)
		
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

anonymous · Answer

$$f(1)=9$$ for sure, but all have that choice
how do you get from 9 to 5?

anonymous · Answer

I don't know