Question

determine se existir o coeficiente angular da reta que passa pelos pontos a(1,2) e b(-2,-1) ?

Answer 1

m = coef angular = Δy/Δx

y1 =2 ; y2= -1

x1 = 1 ; x2 = -2

m = ( -1 - 2)/(-2 - 1)

m = -3/-3

m =1