Question

Determine o coeficiente angular da reta que passa pelo ponto A(3, 1) e B(-1, 5)
a)-1
b) 0
c) 1
d) 2
e) 3

Answer 1

$\Large\displaystyle\text{ \begin{gathered} \sf{ m=\frac{(y_2-y_1)}{(x_2-x_1)}} \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \sf{m=\dfrac{(5-1)}{(-1-3)} } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered} \sf{m=-\dfrac{4}{4} } \end{gathered} }$

$\Large\displaystyle\text{ \begin{gathered}\boxed{ \sf{m=-1 } }\leftarrow\textsf{Letra A}\end{gathered} }$