Tentukan persamaan garis melalui titik (-3,-1) dan (-5,7)

y+1/7+1 = x+3/-5+3
-2(y+1) = 8(x+3)
   y+1 = (8x+24)/-2
        y =  -4x -12 -1 = -4x -13

m : y2-y1/x2-x1
m :7-(-1)/-5-(-3)
m :8/-2
m: -4
pgl: y-y1: m(x-x1)
y-7 : -4 (x-(-5))
y-7 : -4x-20
y : -4x-20+7
y :-4x-13