Persamaan garis l adalah.. A. y= -2x + 8 B. y= 2x-8 C. y= -1/2x +2 D. y=1/2x -2

Kelas 8 Matematika
Bab Persamaan Garis

(4, 0) dan (0, -2)

m1 = (y2 - y1)/(x2 - x1)
m1 = (-2 - 0)/(0 - 4)
m1 = -2/-4
m1 = 1/2

m1 . m2 = -1
1/2 . m2 = -1
m2 = -1 . 2/1
m2 = -2

y = m (x - x1) + y1
y = (-2) . (x - 4) + 0
y = -2x + 8