Yolanda wants to rent a boat and spend less than $90. The boat costs $8 per hour, and Yolanda has a discount coupon for $6 off. What are the possible numbers of hours Yolanda could rent the boat?

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