The answer to this question is most likely M = 5/1. if you take G (4, -4) and F (6,2), by creating a graph you can establish how this will rise by 15 units, and then run 5 units, which means you end up with 15/1. Next, when you do H (-5, -1) and E (-3, 5) you will find it is also 15 units rising, and then a 5 unit run, so this is also 15/5. You then need to divide this by 3, to find your answer - M =5/1