Question

Cual es la ecuacion de la recta representada?

a) y= 120x +20
b) -20x+120
c) 20×+120
d) y= -20X-120​

Answer 1

P(1,100)

P2(3,60)

$y - y1 = \frac{y2 -y1}{yx - x1} (x - x1)$

$y - 100 = \frac{60 - 100}{3 - 1} (x - 1)$

$y -100 = - \frac{40}{2} (x - 1)$

$y = - 100 = - 20(x - 1)$

$y - 100 = - 20x + 20$

$y = - 20x + 20 + 100$

$y = - 20x + 120$

opcion B