\text{To complete the table:}
\text{1. The formula for Savings is: } S = Y - C \text{, where } C \text{ is consumption.}
\text{2. For Income = 0, Savings (i) is: } S = 0 - 30 = -30.
\text{3. For Income = 100, Savings (ii) is: } S = 100 - 30 = 70.
\[\text{4. APC is calculated as: } APC = \frac{C}{Y}.\]
\[\text{For Income = 100, APC = } \frac{30}{100} = 1.\]