QUESTION 21 Using c subscript 1 and c subscript 2 to represent the objective coefficients of x subscript 1 and x subscript 2, respectively, the slope of a line for the objective function can be represented by
c subscript 1 over c subscript 2
c subscript 2 over c subscript 1
negative c subscript 1 over c subscript 2
negative c subscript 2 over c subscript 1
QUESTION 22. The slope of the line representing the equation part of the constraint 3 x subscript 1 plus 2 x subscript 2 less or equal than 180 is
negative 3 over 2
3 over 2
negative 2 over 3
2 over 3
none of the above
QUESTION 23. The slope of the line representing the equation part of the constraint 6 x subscript 1 plus 7 x subscript 2 less or equal than 420 is
negative 6 over 7
6 over 7
negative 7 over 6
7 over 6
Keeping c subscript 1 constant at c subscript 1 equals 5 , the interval for c subscript 2 in which the current optimal solution remains optimal is
a. -35/6 ≤ C₂ ≤ 10/3
b. -35/6 ≤ C₂ ≤ -10/3
c. -10/3 ≤ C₂ ≤ -35/6
d. 10/3 ≤ C₂ ≤ 35/6