Answer:
A. -5
Step-by-step explanation:
[tex]\mathrm{Slope}=\frac{y_2-y_1}{x_2-x_1}\\\\\left(x_1,\:y_1\right)=\left(-9,\:6\right),\:\\\left(x_2,\:y_2\right)=\left(-6,\:-9\right)\\\\m=\frac{-9-6}{-6-\left(-9\right)}\\\\m =\frac{-15}{-6+9}\\ \\m = \frac{-15}{3}\\ \\m =-5[/tex]
