The slope is (4,3). You look at the y intercept (where the y axis is crossed by the line) and simply count rise over run until you reach the next point. The next point from the y intercept (-2,0) is (2,3).
-2+4=2 0+3=3
And there you go. In fraction form it’s 4/3. Hope this helped!
(0,2)
(8,0)