8, 17, 26, 35, 44, ...

The first 5 terms in a sequence are shown above. Each term after the first is found by adding 9 to the term immediately preceding it. Which term in this sequence is equal to 8+(26-1)9?

a) the 8th

b) the 9th

c) the 25th

d) the 26th

e) the 27th

I picked the 27th since i remembered there was a formula that was (n-1). But the correct is d) the 26th. why? Instead of writing out all the terms is there another other way? A faster way? Thanks in advance!