Answer:
A) Opportunity Cost = 1/15 or 0.067 car per wheat
B) PPC downward sloping concave curve, with cars & wheat axis intercepts = 20 & 300 (resp). 15M bushels consumption with 10M cars
C) 1 Car : 20 bushels wheat is not beneficial deal
Explanation:
A) Opportunity Cost is the cost of next best alternative foregone while choosing an alternative.
B) Production Possibility curve curve shows 2 product combinations, that an economy can produce with given resources & technology. Given fixed resources & technology, goods are inversely related & so curve downward sloping. And, it is concave due to increasing Marginal Opportunity Cost.
C) Domestic Car : Wheat trade off ratio is = 20M : 300M ie 1: 15 . So, Trade of 20 bushels wheat per car is not beneficial for Canada. As, it is higher than domestic sacrifise ratio of 15 bushels wheat per car.