試題詳解

複選題
13. (5%) Use the midpoint method to calculate the percentage change in weekly quantity of facial masks rationing between week 5 and week 3, and the percentage change in quantity demanded for boxed faciai masks at Yuanlin's Ji- Sin Pharmacy before/after the new local case was a announced. Which of these statements are true?
(A)The demand curve of facial masks shifted to the right after the new local case as announced.
(B) The percentage change is larger at Yuanlin's Ji-Sin Pharmacy than from weekly quantity rationed.
(C) The percentage change in weekly quantity between week 5 and week 3 is greater than 120%.
(D) The percentage change at Yuanlin's Ji-Sin Pharmacy is smaller or equal to 150%.
(E) None of the above.