Your answer would be Quadrant III (Answer #3)
5/6 + 1/3
To add both sides need the same denominator. To give he fractions a common denominator, multiply the second fraction (1/3) by 2.
5/6 + 2/6
Add the numerators
7/6
Change into mixed number
1 and 1/6
I hope this helps, feel free to ask any questions you may have
What coordinates do you need? If it's the starting and ending ones of the line then it's, (4,4) and (10,10)