1.   The graph of the system of inequalities is shown below. Name the coordinates of the vertices of the polygonal set.
   
   
    A.      (1, -1), (-1, 3), and (2, 1) B.      (1, -4), (3, 0), and (0, 1)
    C.      (0, 0), (2, 0), and (2, 6) D.      (-1, 1), (-1, 4), and (2, 1)
    Hint

  2.   Find the maximum value of f(x, y) = 2x + y - 2 for the polygonal convex set determined by the system of inequalities.
   
    A.      18 B.      6
    C.      14 D.      12
    Hint

  3.   Solve the system of inequalities by graphing.
x + y 4
2x - y < 4
y 0
    A. B.
    C. D.
    Hint

  4.   Name the coordinates of the vertices of the polygonal convex set.
   
    A. (-4,-1), (-4,6), (-2,4), (4,-2) B. (-4,-1), (-4,3), (-2,4), (4,-2)
    C. (-4,-1), (-4,3), (-2,-4), (4,-2) D. (-4,-1), (-4,3), (-2,4), (4,2)
    Hint

  5.   Find the maximum value of f(x, y) = x - 4y for the system of inequalities.
2x + y 3
2x + y -2
y 4
x < 1
    A. 16 B. -16
    C. -17 D. -3
    Hint



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