We know that
[tex]{\boxed{\sf Slope_{(m)}=\dfrac {y_2-y_1}{x_2-x_1}}}[/tex]
[tex]\qquad\quad {:}\longrightarrow\tt m=\dfrac {3-2}{7-0}[/tex]
[tex]\qquad\quad {:}\longrightarrow\tt m=\dfrac {1}{7}[/tex]
[tex]\therefore \sf Slope\:of\:the\:line\:is\:\dfrac {1}{7}[/tex]