Every 2.5 hours, a machine produces 150 baskets. What is the unit rate of this proportional relationship? (Hint: You are trying to find how many baskets in one hour.)

60 baskets per hour
60 baskets per hour

2.5 baskets per hour
2.5 baskets per hour

25 baskets per hour
25 baskets per hour

16.6 baskets per hour