Respostas

2013-08-25T14:51:06-03:00
y=ax+b\\\\y=-x+b

Pelo ponto (-1,-2), temos:

y=-x+b\\\\
-2=-(-1)+b\\\\
-2=1+b\\\\
b=-3

Então:

\boxed{f(x)=-x-3}
2 4 2