Respuesta :

[tex]\begin{gathered} x_1=1,y_1=2,x_2=2,y_2=5 \\ The\text{ slope of line is,} \\ m=\frac{y_2-y_1}{x_2-x_1} \\ m=\frac{5-2}{2-1} \\ m=3 \end{gathered}[/tex]