The 15th term of the arithmetic sequence 
Option B is correct
The nth term of an arithmetic sequence is given as:

The first value, a = 22

Since 

The common difference, d = 3

The 15th term of the arithmetic sequence = 64
Learn more here: brainly.com/question/24072079
B is just the y-intercept or where the line goes over the y axis so it would be 50
X and y are points that help u place other points