Table 131Canada's Saving,Investment,Import,and Export Functions (In Billions of Dollars) Under a a System

Table 13.1.Canada's Saving,Investment,Import,and Export Functions (in billions of dollars) Under a System of Fixed Exchange Rates
Export Function X = 3000
Investment Function I = 1000
Saving Function S = -1000 + 0.2Y
Import Function M = 500 + 0.25Y
-Referring to Table 13.1,if Canada's income rises by $200 billion,saving would rise by:

A) $10 billion
B) $20 billion
C) $30 billion
D) $40 billion