A constraint with a positive slack value will have a positive dual price. will have a negative dual price. will have a dual price of zero. has no restrictions for its dual price.

In a problem relating to optimization, a slack variable is simply referred to a variable which can be added to the inequality constraint so that it'll be changed to an equality.

It should be noted that when a slack variable is introduce, the inequality constraint will have to be replaced by an equality constraint. A constraint with a positive slack value will have a negative dual price of zero.

Martebi Martebi · Answer 2 · 2021-12-02T15:21:57+01:00

There are some constraint that often affect the value of commodities. A constraint with a positive slack value will have a dual price of zero.

The value of the dual price for a constraint can have a positive slack value. When the slack variable value is zero, its dual value which is also called the shadow price is known to be positive.

When the dual value is 10, it implies that the objective function value will increase by 20, when the right hand side value of the corresponding constraint improves by 2 units.

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