Question

Considere uma reta que passa pelos pontos P = (1, 1) e Q = (2, 1). Assinale a opção que corresponde a equação reduzida dessa reta. * 1 ponto  A) y = 2x + 2 B) y = x - 1 C) y = x + 1 D) y = 1 ​

Answer 1

$\large\boxed{\begin{array}{l}\sf P(1,1)~~Q(2,1)\\\underline{\rm c\acute alculo~do~coeficiente~angular\!:}\\\sf m=\dfrac{y_Q-y_P}{ x_Q-x_P}\\\sf m=\dfrac{1-1}{2-1}=0\\\sf y=y_0+m(x-x_0)\\\sf adotando~o~ponto~P(1,1)~temos:\\\sf y=1+0\cdot(x-1)\\\sf y=1\\\huge\boxed{\boxed{\boxed{\boxed{\sf\maltese~alternativa~D}}}}\end{array}}$