Use the slope formula, and plug in the two points:
[tex]m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}[/tex]
[tex]m=\frac{4-(-5)}{4-(-6)}[/tex]
[tex]m=\frac{4+5}{4+6}[/tex]
[tex]m=\frac{9}{10}[/tex]
