Income Savings I(planned) Consumption
200 -20 60
400 0 60
600 20 60
800 40 60
1000 60 60
1. Fill in the last column.
2. The equilibrium level of income in this example is ________________.
3. According to this data, the marginal propensity to consume is __________.
4. The consumption function corresponding to this data is _______________.