The line is given ith two points, A (4, 5) and B (9, 1)
The slope is calculated as follows;
[tex]\begin{gathered} m=\frac{y_2-y_1}{x_2-x_1} \\ m=\frac{1-5}{9-4} \\ m=\frac{-4}{5} \\ m=-\frac{4}{5} \end{gathered}[/tex]The slope of the line that passes through the given points is -4/5