Respostas

2014-04-27T18:58:39-03:00
Coef. angular da reta : Dy / Dx
= (-3-1) / (2-8) = 2/3
(y - 1) = 2/3 (x - 8) multiplicando por 3
3y - 3 = 2x - 16
2x - 3y - 13 = 0 (resp A)