-Using the Data in the Above Table, If Income Is

$$\begin{array} { | c | c | } \hline \begin{array} { l } \text { Income } \\\text { (dollars per } \\\text { month) }\end{array} & \begin{array} { c } \text { Amount spent on } \\\text { restaurant meals } \\\text { (dollars per month) }\end{array} \\\hline 50 & 20 \\\hline 100 & 40 \\\hline 150 & 60 \\\hline 200 & 80 \\\hline\end{array}$$
-Using the data in the above table, if income is on the x-axis and the amount spent on restaurant meals is on the y-axis, the slope of the straight line graph equals

A) 0.5.
B) 0.2.
C) 0.4.
D) 2.5.