Respuesta :

The formula for slope:

m = [tex] \frac{y_{2} - y_1 }{x_2-x_1} [/tex]

[tex] \frac{-9-9}{-14-15} [/tex]

-9-9 = -18
-14-15 = -29

[tex] \frac{-18}{-29} [/tex]