Answer:
Given: Disposable income (Yd) is $200 billion, consumption (C) is $150 billion, and saving (S) is $50 billion. The change in disposable income (Yd) is $20 billion, the change in consumption (C) is $18 billion, and the change in saving (C) is $2 billion. Hence, the economy's MPC is 0.9.
Step-by-step explanation: