Question

escreva a função afim f(1)=5 e f(-2)=7​

Answer 1

(1,5) (-2,7)

$a = \frac{7 - 5}{ - 2 - 1} = \frac{2}{ - 3} = - \frac{2}{3}$

y=y₀+a(x-x₀)

$y = 5 - \frac{2}{3} (x - 1) \\ y = 5 - \frac{2}{3}x + \frac{2}{3} \\ y = \frac{15 - 2x + 2}{3} = \frac{17 - 2x}{3}$