Question

Qual é função f representada na figura abaixo?

Answer 1

A(1,3) B(4,2)

$\huge\begin{vmatrix}1&3&1\\4&2&1\\x&y&1\end{vmatrix}=0$

$\mathsf{1(2-y)-3(4-x)+1(4y-2x)=0}\\\mathsf{2-y-12+3x+4y-2x=0}\\\mathsf{3y=-x+10}\\\mathsf{y=-\dfrac{1}{3}x+\dfrac{10}{3}}$