Simple...
you have: (-2,20) and (3,-10,)
Using [tex] \frac{ y_{1}- y_{2} }{ x_{1}- x_{2} } [/tex] to find slope--->>>
[tex] \frac{20--10}{-2-3} = \frac{30}{-5} [/tex]
=-6
m=-6
Using y=mx+b to find the equation of the line-->>>(Use any of the coordinates)
(-2,20)
20=-6(-2)+b
20=12+b
20=12+b
-12 -12
8=b
y=-6x+8
Thus, your answer.