Respostas

2014-04-09T17:49:04-03:00
Coeficiente angular 
m= \frac{y-y0}{x-x0}

a(3,13)  = (x0, y0)
b (-1,-7) = (x , y )


m= \frac{-7-13}{-1-3} = \frac{-20}{-4} =5\\\\\\\ m=5