Take 2points
Slope:-
[tex]\\ \tt\longmapsto m= \dfrac{9-12}{-1+2}=\dfrac{-3}{1}=-3[/tex]
Equation of line in point slope form
.[tex]\\ \tt\longmapsto y-y_1=m(x-x_1)[/tex]
[tex]\\ \tt\longmapsto y-12=-3(x+2)[/tex]
[tex]\\ \tt\longmapsto y-12=-3x-6[/tex]
[tex]\\ \tt\longmapsto y=-3x+6[/tex]
Option D is correct
