persamaan garis yg melalui titik (-3,4) dan (3,2) adalah... jawab: y= -1/3x+3 itu bener gk y?

Kelas 8 Matematika
Bab Persamaan Garis

(y - y1)/(y2 - y1) = (x - x1)/(x2 - x1)
(y - 4)/(2 - 4) = (x - (-3))/(3 - (-3))
(y - 4)/(-2) = (x + 3)/6

◎◎ 6 : (-2) = -3 ◎◎

-3 (y - 4) = x + 3
-3y + 12 = x + 3
-3y = x + 3 - 12
-3y = x - 9
y = (-1/3) x + 3