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Hi John I normally use simultaneous equation to find optimal solution on each point of intersection on the feasible region. but i dont know the basis that is used to find ISO contribution line. for eg when objective function C=9x+8y what assumption am I to make to find iso contribution line so that i only calculate the constraints that have optimal solution to save time.
ThanksYou should watch the free lecture on linear programming where I explain how to do this.
It is only the angle/gradient of the iso-contribution line that is needed and so you can let C be any figure you want because the angle will be the same whatever the value of C.
In the free lecture I go through how to choose a sensible value for C in order to draw the line.
I watched the lecture again and again, finally i got the silent point as the further away of the parallel line from origin i.e zero the greater the contribution.
nice one OT!
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