Answer: The slope is 1
Step-by-step explanation: The slope of 2 lines can be solved by rise over run or basiclly the change in y over the change in x. This can be represented by:

Given the the points, we can plug in the values into each variable.
The y values of the point represent the second value and the x value is the first number so in (-5, -6), -6 represents the y and -5 represents x.
For (-7, -8), y is -8 and x is -7
Plugging in the values you get:

Make sure if you set the point as (x1, y1) or (x2,y2) and not (x1,y2) or (x2,y1), the number has to be consistant.
If you solve you get:
-2/-2 = slope
2/2 = slope
1 = slope
so the slope is 1.
Hope this helps!