# Graphs

posted by
**Mischa**
.

Suppose there's a model with 2 constraints originally. Now that another constraint is added. Which of the following are possible:

1) feasible region shrinks

2) feasible region stays the same

3) feasible region expands

and

Which of the following are possible:

1) optimal value in target cell decreases

2) optimal value in target cell stays the same

3) optimal value in target cell increases

I think the answer is 1) for both questions, but I want to ask do they hold in general? Or is there some exceptions?