-Using the Data in the Table Above, with Y Measured

Multiple Choice

$$\begin{array} { | l | l | } \hline x & y \\\hline 0 & 0 \\\hline 1 & 3 \\\hline 2 & 6 \\\hline 3 & 9 \\\hline 4 & 12 \\\hline 5 & 15 \\\hline\end{array}$$
-Using the data in the table above, with y measured on the vertical axis, the slope of the line relating y to x is

A) 3.
B) 1/3.
C) 6.
D) 1.