Kristy feeds her cat canned food and dry food. The canned food costs $2.50 per pound, and the dry food costs $1.50 per pound. She wants to feed her cat at least 10 pounds of dry food and 8 pounds of canned food per month. She wants to spend a total of at most $40 per month on cat food. The graph below shows the solution to a system of inequalities that represents this situation.