In order to find the slope we will need two points where the line passes through
(3,18)=(x1,y1)
(12,6)=(x2,y2)
The formula to calculate the slope is
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]
we substitute the values
[tex]m=\frac{6-18}{12-3}=\frac{-12}{9}=-\frac{4}{3}[/tex]
The slope is -4/3
ANSWER
A. -4/3
