What is the range of the function?
o all real numbers less than or equal to 4
o all real numbers less than or equal to -3
o all real numbers greater than or equal to 4
o all real numbers greater than or equal to -3

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