What is the ninth term of the arithmetic sequence defined by the rule below? A(n) = -15 + 2(n – 1).
A. 1
B. -1
C. 31
D. -31

check the picture below.

step-by-step explanation:

once you graph it hit 2nd (the blue button) and graph

that takes you to a table of coordinates

on the left is x coordinates and on the right is y coordinates and an empty box

(you may have to scroll up/down in order to get ( x, 0)