The slope equation is
y = mx + b
We already know m = 2/3, so now we just use the x and y coordinates in the point given to find b.

First, we plug in x = -3, y = 2, and m = 2/3. Then, we combine 2/3 and -3 to become -2. Then we add 2 to both sides, and we get b = 4.
The final slope equation is then:

Which is answer D.