Persamaan garis yang melalui titik (-3,6) dan (1,4) adalah...

Kelas 8 Matematika
Bab 3 - Bab Persamaan Garis

(y - y1)/(y2 - y1) = (x - x1)/(x2 - x1)
(y - 6)/(4 - 6) = (x - (-3)) / (1 - (-3))
(y - 6)/(-2) = (x + 3)/4

◎◎ 4 : (-2) = -2 ◎◎

(-2) (y - 6) = x + 3
-2y + 12 = x + 3
x + 2y = 12 - 3
x + 2y = 9

(Y-y1)/(y2-y1) = (x-x1)/(x2-x1)
(y-6)/(4-6) = (x-(-3))/(1-(-3))
(Y-6)/-2 = (x+3)/4
4(y-6) = -2(x+3)
4y-24 = -2x-6
4y = -2x + 18
-------------------- ÷ 2
2y = -x+9
Atau
Y = (-x+9)/2
Atau
Y = -1/2 x + 9/2
Atau
Y = -1/2x + 4 1/2

Semoga membantu, kalau bener jadikan terbaik ya. Tq :)