Answer: -8
Step-by-step explanation:
The slope of this line is 8 because the formula for finding slope is :
[tex]\frac{y_{2} - y_{1}} {x_{2} - x_{1}}[/tex]
Using two points from your table for ex: (0,18) and (-1,10). By plugging we get :
[tex]\frac{18-10}{0--1} = \frac{8}{1}= 8[/tex]