- Draw a picture of the scenario, if you can.
Step(1) Formulate the objective function.
Step(2) Reduce the objective function to One variable.
Step(3) Take the derivative of the function and find the critical value(s).
Step(4) Find the local max or min by either First derivative (for rational fractions ) or Second derivative test (polynomials) and check the end points to locate the max or min.