EXPLANATION
Since the line AB contains the points A= (x_1,y_1) = (8,-4) and B= (x_2,y_2)=(1,-5) we can apply the slope formula in order its value as shown as follows:
[tex]\text{Slope}=\frac{y_2-y_1}{x_2-x_1}=\frac{-5-(-4)}{1-8}[/tex]
Adding and subtracting numbers:
[tex]\text{Slope}=\frac{-1}{-7}=\frac{1}{7}[/tex]
In conclusion, the slope is 1/7
