Question

O coeficiente angular (m) que passa pelos pontos A (1,3) e B (2,7)

Answer 1

m = Δy / Δx
m = (yB - yA) / (xB - xA)
m = (7 - 3) / (2 - 1)
m = 4 / 1
m = 4

y = mx + n
y = 4x + n

(1, 3)
3 = 4.1 + n
n = 3 - 4
n = -1

y = 4x - 1