Which graph represents the function f(x) = -x2 + 5? 10
8
6
2
0
-10 -3 6 2
4
6
x

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