For an LPP, minimise subject to constraints and , then is equal to
Step 1. Find the endpoints of the constraints .
for the value of
and for the value of
Therefore, the points of line are and .
Find the endpoints of the constraints .
Therefore, the points of line are and .
Find the endpoints of the constraints.
Therefore, the points of line is .
Find the endpoints of the constraints .
Therefore, the points of line are and .
Step 2. Draw the graph by using points and locate common points of all constraints.
Step 3. Calculate the values of at points and .
At point :
At point :
At point :
At point :
At point :
Therefore, the minimum value of is .