To find the slope of these points you’re going to want to use the Formula, Y2-Y1/X2-X1
So first we get Y2, which is 4 and we subtract is from Y1 which is 2 and you get 2. Then you get X2 which is 3 and subtract is from X1 which is 0. Now you want to divide the Y over the X which would be 2/0 which makes the slope undefined.
2/0 = undefined