Persamaan garis melalui titik A(-3,4)dan B(2,-5)adalah

y-y1　　x-x1
___　= ___
y2-y1 　x2-x1

y-(-3)　　x-2
___　=　___
-5-4　　2-(-3)

y+3　 　x-2 　
___　=　___
-9 　　　6

6.(y+3)　=　-9.(x-2)
6y+18　=　-9x-(-18)
6y-9x　=　18+18
6y-9x　=　36

bener gk?

y-y1/y2-y1 = x-x1/x2-x1
y-4/(-5)-4 = x-(-3)/2-(-3)
y-4/(-5)+(-4) = x+3/2+3
y-4/-9 = x+3/5
5(y-4) =-9(x+3)
5y-20 = -9x-27
5y+9x = -27+20
14y+x = -7
y+x = 14/-7
y+x = -2