Resposta :
[tex]m = \frac{\Delta y}{\Delta x} = \frac{y_{f}-y_{i}}{x_{f}-x_{i}} = \frac{3-2}{4-2} = \boxed{\boxed{\frac{1}{2}}}[/tex]
[tex]tag\alpha=m= \frac{yb(pontofinal)-ya(pontoinicial)}{xb(ponto final)-xa(pontoinicial)} = \frac{3-2}{4-2}= \frac{1}{2} ou 0,5[/tex]
espero ter ajudado..