Question

NEED AN A !!!!!!!! MATH HELP!!!!!!!

Answer 1

Nevermind, I was wrong. Ignore me. 

Answer 2

Plug n = 1 into the original formula to get
an = 14 - 9n
a1 = 14 - 9*1
a1 = 5
So the first term is 5

The common difference is -9 as this is the slope in front of the n term. This means each term is going down by 9 each time. Notice the second term is 
an = 14-9n
a2 = 14-9*2
a2 = -4
and so on...

To get the nth term, we subtract 9 from the (n-1)st term
That's the same as saying
$a_n = a_{n-1}-9$

So all together, the rule is
$a_n = a_{n-1} - 9\\ a_1 = 5$

Final Answer: Choice B