To find the slope you use the trigonometrict function tan:
[tex]\tan \theta=\frac{o}{a}[/tex]o is the opposite leg to the slope
a is the adjacent leg to the slope
[tex]\begin{gathered} \tan \theta=\frac{2}{20} \\ \\ \theta=\tan ^{-1}(\frac{2}{20}) \\ \\ \theta=5.71º \end{gathered}[/tex]THen, the slope is 5.71º