Respostas

2014-09-01T16:25:11-03:00
Só substituir na fórmula y-y0=m(x-x0)

A) y-4=-1(x+1)
y-4+x+1=0
x+y-3=0

B) y+2=2(x+1)
y+2-2x-2=0
-2x+y=0

C) y-4=-3(x-0)
3x+y-4=0

D) y-0=-1(x+2)
x+y+2=0