Answer:
-1/2 is the slope
Step-by-step explanation:
I believe you are trying to find the slope. To do that use this equation.
[tex]\frac{y2 - y1}{x2 - x1}[/tex]
NOW PLUG IN YOUR POINTS (-15, -5) (-9, -8)
[tex]\frac{-8 - -5}{-9 - -15} \\\\\frac{-3}{6}/3 = -\frac{1}{2}[/tex]
Hope this helps ya!!