Question

A equacao da reta que passa pelos pontos A(1,4)e B(2,1)e?

Answer 1

M = yb - ya / xb - xa = 1 - 4 / 2 - 1 = -3/1 = -3

y - ya = m ( x - xa )

y - 4 = -3 ( x - 1 )

y - 4 = -3x + 3

y = -3x + 7

3x + y - 7 = 0