In order to find the slope of the line, we need to divide the change in the y-coordinates by the change in the x-coordinates.
Using the points (3, 1200) and (6, 800), we have that:
[tex]m=\frac{\Delta y}{\Delta x}=\frac{800-1200}{6-3}=-\frac{400}{3}=-166.67[/tex]
The slope of this line is -166.67.
The slope means the increase or decrease in y for each unitary increase in x.
