24. If the marginal rate of substitution (AY/AX) is 10 for goods x and y, in order to maintain same level of utility a) consumer is willing substitute one unit of good x for 10 units of good y b) consumer is willing substitute one unit of good y for 10 units of good x c) consumer is willing substitute 10 unit of good x for 10 units of good y d) consumer is willing substitute one unit of good x for one unit of good y 25. According to the graph below Y A B C The rotation of the budget line from AB to AC is a result of a. Increase in consumer's income b. Increase in price of good Y c. Decrease in price of good Y d. Decrease in price of good X X