Chck farms raises hens and roosters.   they have enough space to raise at most  300  300  birds per year.   each hen eats  80    80  pounds of food per year,   and each rooster eats  60  60  pounds of food per year.   the business can only afford  20,000    20,000  pounds of food per year.   the graph below shows the solution set of a system of linear inequalities that represents this situation.