Question 231844
Hello, 
The slope of a line is found as follows of the two points (-5,-18)(-9,-19).

            (y - y)/(x - x)    
so let's take the first y (-18) and subtract the second y(-19). 
It'll look like this: -18 - (-19)  When you have two negatives sign together it makes a positive. (+)   
So this will be -18 + 19 = 1  
Now, let's look at the x's. 
-5 - (-9) = +4
The slope is 1/4
Just as a note you could start with with the other y first -19 - (-18) = -1
And use the same pattern with x's.       -9 -(-5) = -4
That gives us -1/-4 but when you have two negatives it turns positive and we come up with the same answer 1/4
RJ Toftness
www.math-unlock.com