(Advanced Analysis) Which of the Following Equations Represents the Saving

Multiple Choice

$$\begin{array} { | c | c | } \hline \text { Disposable Income } \left( Y _ { d } \right) & \text { Consumption } ( C ) \\\hline \$ 0 & \$ 40 \\\hline 100 & 100 \\\hline 200 & 160 \\\hline 300 & 220 \\\hline 400 & 280 \\\hline\end{array}$$ (Advanced analysis) Which of the following equations represents the saving schedule implicit in the given data?

A) S = C ? Yd.
B) S = 40 + 0.4Yd.
C) S = 40 + 0.6Yd.
D) S = ?40 + 0.4Yd.