My name is Awais and I am from Pakistan. You are really a great teacher. My question is about drawing iso contribution line.. I did not understand from lectures.. How can we assume a figure to calculate the points of iso contribution line.Please guide me.. what is the logic behind assuming total contribution say 90 or some other figure.
You can choose any total contribution that you want. Whatever you choose (whether it be 90 or 100 or whatever) the angle (slope/gradient) of the line you end up with will be the same, and it is only the angle of the line that we need.
You just need to choose a total which ends up with a line that does actually fit on the graph 🙂