Respuesta :

The slope =

[tex]\frac{y_2-y_1}{x_2-x_1}=\frac{5-4}{2-1}=\frac{1}{1}=1[/tex]

The equation of the line is;

[tex]\begin{gathered} y-y_1=\text{slope(x}-x_1) \\ \\ y-4=1(x-1) \\ y-4=x-1 \\ -x+y=4-1 \\ -x+y=3 \end{gathered}[/tex]

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