Question 28968
Your y values are going from 4 to -1; that is a decrease of 5
Your x values are going from -2 to 2; that is an increase of 4
So the "run" is 4 and the "rise" is -5
The general way of doing this is to subtract one y-value from 
the other and then to subtract the CORRESPONDING x-values.
Doing this you could have either of the following:
[-1-4]/(2-(-2)]=-5/4
or you could have:
[4-(-1)[/[-2-2]= 5/(-4)
In both cases the final answer is -5/4
Cheers,
Stan H.