Persamaan garis(6,-8) dan (-2,6)

m=y2-y1/x2-x1
   =6+8/-8
   =14/-8
   =7/-4 
persamaannya
y-y1=m(x-x1)
y+8=7/-4(x-6)
-4(y+8)=7(x-6)
-4y-32=7x-42
7x+4y-10=0

Bab Persamaan Garis
Matematika SMP Kelas VIII

(y - y1) / (y2 - y1) = (x - x1) / (x2 - x1)
(y + 8) / (6 + 8) = (x - 6) / (-2 - 6)
(y + 8) / 14 = (x - 6) / -8
-8 (y + 8) = 14 (x - 6)
-8y - 64 = 14x - 84
14x + 8y = 84 - 64
14x + 8y = 20
7x + 4y = 10