it's D 1/3 cause your going up 1 and over 3 so that should give you a positive cause the line is going up instead of down . now on the other hand if the line was going down it would me -1/3 cause went down one and over negative three, but in ur case it's ↓
D.) 1/3
-Hope this helped you im 100% sure this is right . :)
