Answer: -5
Step-by-step explanation:
The formula for calculating the slope of a line is given as :
m=\frac{y_{2} }{x_{2}} - \frac{y_{1}}{x_{1}}
[tex]x_{1}[/tex] = 8
[tex]x_{2}[/tex] = 6
[tex]y_{1}[/tex] = 5
[tex]y_{2}[/tex] = 15
substituting into the formula , we have
m = [tex]\frac{15-5}{6-8}[/tex]
m = [tex]\frac{10}{-2}[/tex]
m = -5
Therefore the slope is -5