Answer:
7) -5/28
8) -17/14
9) 2/3
10) 9/23
11) -6/7
12) -22/31
Step-by-step explanation:
To find slope with just 2 points given, you must do:

This will give you your Slope, written as rise/run.
You're essentially subtracting the y values, and the x values.
Let us do #7 for example:
5-0 = 5
-16-12 = -28
So slope = -5/28.
Apply this for all other questions, and be sure to watch out for the signs so you don't make a mistake. Also don't forget to simplify if you can.
Hope this helped :)