Answer:
-7/2 or -3.5
Explanation:
The slope is rise over run.
The rise is how much it went up and the run is how much it went right
The line went up 7 units while going -2 units to the right (meaning it went 2 units to the left)
This makes our slope 7/-2 which is the same as -7/2 or -3.5
