Compare x to x and y to y. In this case, the first x is 5 and the second x is 3. [Remember the point format is (x, y).] 5 to 3 on the number line is -2. Then the first y is 9 and the second is also 9. 9 to 9 on the number line is 0. Also, recall that the slope is the change in y over the change in x so the slope is: 0/-2 Hope this helps. (:
