Data on After-Tax Income and Consumption Spending for the Adam

Multiple Choice

Data on after-tax income and consumption spending for the Adam Smith family are given below: $\begin{array}{cc}\underline { \text { After-tax Income }} & \underline { \text { Consumption Spending }} \\\$ 9,000 & \$ 18,100 \\\$ 14,000 & \$ 22,600 \\\$ 19,000 & \$ 27,100 \\\$ 24,000 & \$ 31,600\end{array}$
Based on these data,the Adam Smith family has a marginal propensity to consume of:

A) 0.9.
B) 0.8.
C) 0.75.
D) 0.6.