A represents the lower number in the group.
From -4 to 1 (range equals the y values)
First you convert 1/4 so it would have the same denominator as 3/8:
1/4=2/8
Now you compare the fractions
2/8 ? 3/8
3/8 is more, so the dish with 3/8 of an orange has more.
Hope this helps!