Which of the following does not represent a function?
a
{(-2, 4), (-1, 2), (0, 0), (1, -2)}

b

c

d

A

Step-by-step explanation:

answer: evaluate the objective function at each vertex to determine which - and -values, if any, maximize or minimize the function. example: find the minimum value and maximum value of the objective function f ( x , y ) = 4 x + 5 y , subject to the following constraints

there is no picture in order for this question to be answered