Question

detemine a eguacao geral da reta que passa pelos pontos A (1,1)e B (-2,-2)

Answer 1

A(1,1) e B(-2,-2)

m = ( yb - ya ) / ( xb - xa ) = ( -2 - 1 ) / ( -2 - 1 ) = -3/-3 = 1

y - ya = m ( x - xa )

y - 1 = 1 ( x - 1 )

y - 1 = x - 1

y = x - 1 + 1

y = x

x - y = 0