Final answer:
The range of this functional relationship is (0, 10). None of the option is correct
Step-by-step explanation:
The range of this functional relationship can be found by considering the maximum and minimum values of the dependent variable, which in this case is the number of coupon books sold.
The minimum value is 0 because it is possible for Willie to not sell any coupon books.
The maximum value is 10 because Willie has exactly 10 coupon books to sell.
Therefore, the range of this functional relationship is (0, 10).
None of the option is correct