Hello can someone help ! I am doing slope of of a line .

We have to use the slope formula
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]Where,
[tex]\begin{gathered} x_1=2 \\ x_2=6 \\ y_1=6 \\ y_2=15 \end{gathered}[/tex]Let's replace these values
[tex]m=\frac{15-6}{6-2}=\frac{9}{4}[/tex]