Question

Obtenha a reta y= a.x + b que passa pelos pontos:
a) (1,0 ) e ( 2, -2) b) (1,1) e (0,2)

Answer 1

Bom dia Neide

a)

A(1,0) , B(2, -2)

coeficiente angular

m = (Ay - By)/(Ax - Bx) = (0 + 2)/(1 - 2) = -2

y - Ay = m * (x - Bx)

y - 0 = -2 * (x - 1)

y = -2x + 2

b)

A(1,1), B(0,2) 

m = (By - Ay)/(Bx - Ax) = (2 - 1)/(0 - 1) = -1

y - Ay = m * (x - Bx)
y - 1 = -1 * (x - 1)

y = -x + 2