Answer:
Mid point:
[tex]= (\frac{4+-5}{2}, \frac{2+8}{2} ) \\= (-0.5, 5)[/tex]
Distance:
[tex]= \sqrt{(-5-4)^2+(2-8)^2} \\= \sqrt{(81+36)}\\= \sqrt{117} \\ = 10.81 units[/tex]
Slope:
[tex]= \frac{2-8}{-5-4} \\= \frac{-6}{-9} \\= \frac{6}{9} or\frac{2}{3}[/tex]