Question

slope for (5,0) (-0,-4)

Answer 1

You know you need a graph

Answer 2

(5,0) (0,-4)
(x1,y1) (x2,y2)

m (slope) =
y2-y1
-------
x2-x1

so,

-4-0
------ =
0-5

-4
----
-5

so your answer is -4/-5! Hope this helped. :)