Point b is on a line that has a slope of 2. which of these could be the coordinates of another point on the line?

Slope = rise over run.

When slope = 2:

rise = 2
run = 1

Point B is at (2,4)

To get your answer, your equation will look like: (x + 1, y + 2)

Plug in 2 for x, and 4 for y

(2 + 1, 4 + 2) = (3,6)

Simplify. divide 3 from both x and y

3/3 = 1
6/3 = 2

(1.2) is your other point, and is your answer

hope this helps