You need to select two points on the line:
The rise is the vertical distance, and the run is the horizontal distance:
Rise: Use the coordinates in y to find the rise:
[tex]rise=-5.5-(-1)=-5.5+1=-4.5[/tex]
Run: Use the coordinates in x to find the run:
[tex]\text{run}=0-9=-9[/tex]The slope (m) is: 1/2 or 0.5[tex]\begin{gathered} m=\frac{rise}{\text{run}} \\ \\ m=\frac{-4.5}{-9}=\frac{1}{2} \end{gathered}[/tex]
