Answer the Question on the Basis of the Following Data

Answer the question on the basis of the following data: $\begin{array}{cc}\underline{\text { After-Tax Income} } &\underline{ \text { Consumption }} \\\$ 1,000 & \$ 900 \\2,000 & 1,800 \\3,000 & 2,700 \\4,000 & 3,600 \\5,000 & 4,500\end{array}$ The data suggest that:

A) consumption varies inversely with after-tax income.
B) consumption varies directly with after-tax income.
C) consumption and after-tax income are unrelated.
D) a tax increase will increase consumption.