Nice picture!
What exactly is your question?
Slope = rise/run. But I need a value like Slope =7/6 a numerical value. Maybe to identify the points from the coordinate grid to find the slope usign the Pytagorian formula.
Eg A(7,9) B(4,6). AB = ...
or m = y2 - y 1/ x2-x1
Please help. Any ideas...