Question

A função f(x) é uma função do 1° grau, determine esta função sabendo que f(-1)= 2 e f(2) = 3.

Answer 1

Resposta:  $f(x)=\frac{7+x}{3}$

Explicação passo a passo:

$-x+3y=7\\\\\\3y=7+x\\\\\\y=\frac{7+x}{3}\\\\\\f(x)=\frac{7+x}{3}\\\\\\teste.1\\\\\\f(-1)=\frac{7+(-1)}{3}\\\\\\f(-1)=\frac{7-1}{3}\\\\\\f(-1)=\frac{6}{3}\\\\\\f(-1)=2\\Verdadeiro\\\\\\teste.2\\\\\\f(2)=\frac{7+2}{3}\\\\\\f(2)=\frac{9}{3}\\\\\\f(2)=3\\Verdadeiro$