Question

What is the slope of the line through (-9,6) and (-6,-9)

Answer 1

`\text{The slope formula:}\ m=(y_2-y_1)/(x_2-x_1)\\\\\text{We have:}\\(-9;\ 6)\to x_1=-9;\ y_1=6\\(-6;\ -9)\to x_2=-6;\ y_2=-9\\\\\text{substitute:}\\\\m=(-9-6)/(-6-(-9))=(-15)/(-6+9)=(-15)/(3)=-5`

Answer: m = -5