Question

whats is the slope of the line that passes through the points (3,-1) and (-2,-5)

Answer 1

You just subtract the x's and subtract the y's. So it will be 3- -2 and -1 - -5. Subtracting a negative is like adding a positive so your answer will be 5/4. 

Answer 2

-5-(-1)         -4
--------    =   ---
-2-(3)           5