The linear programming problem has an unusual characteristic. Select a graph of the solution region for the problem and describe the unusual characteristic. Find the minimum value of the objective function (if possible) and where it occurs.
?
Objective function:
?
z = x + y
?
Constraints:
?
x ? 0
y ? 0
-x +y ? 1
-x + 5y ? 7
?
A. 
Minimum at (0, 1): 1
B.
Minimum at (1.5, 0.5): 2
C.
Minimum at (0.5, 1.5): 2
D. ?
Minimum at (0, 0): 0
E.
No minimum.
Answer: D
Mathematics
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