Afarmer can spend no more than $4,000 on fertilizer and seeds. the fertilizer costs $2 per pound and seeds cost $20 per pound.

to summarize the situation, the farmer writes the inequality:

2f + 20s ≤ 4,000, where f is the number of pounds of fertilizer and s is the number of pounds of seeds.

which graph's shaded region shows the possible combinations of fertilizer and seeds the farmer can buy?