Answer:
Third option) m = -
Explanation:
[] Slope is change in y over change in x or rise over run
[] Since we have a graph with easy-to-read points, I will use rise over run
-> I will choose the point (-1, 5)
-> I count down 1 unit to the y-axis of point (2, 4)
-> I count right 3 units to point (2, 4)
-> I get a slope of 1/3
[] Since the line is going from top left to bottom right, it'll be negative
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather