Peggy is making pecan pie to give to her friends at school. She has all the ingredients except for the pecans. She wants to pay no more than $16 for the pecans. The pecans cost $3.20 per pound. The inequality 3.2p ≤ 16 can be used to determine the number of pounds of pecans, p, that Peggy can purchase. Which number line best represents the solution to the inequality?