Persamaan garis lurus yang melaluI titik p(3,-4)dan q(-2,6)adalah

pers garis lurus
(y - y1) / (y2 - y1) = (x - X1) / (x2 - X1)
(y + 4) / (6 + 4) = (x - 3) / (-2 - 3)
(y + 4) / 10 = (x - 3) / -5
- 5(y + 4) = 10 (x - 3)
- 5y - 20 = 10x - 30
- 5y - 10x = - 30 + 20
- 5y - 10x = - 10
5y + 10x = 10

Bab Persamaan Garis
Matematika SMP Kelas VIII

(y - y1) / (y2 - y1) = (x - x1) / (x2 - x1)
(y + 4) / (6 + 4) = (x - 3) / (-2 - 3)
(y + 4) / 10 = (x - 3) / -5

** 10 : (-5) = -2 **

y + 4 = (-2) (x - 3)
y = -2x + 6 - 4
y = -2x + 2