Answer:
It's hard to make out due to the resolution of the image, but I think its #5
Step-by-step explanation:
Just look at the graph and see where each "hill" in the data peaks.
i think is 5+12.
im 80%shure
6.5*6.5=42.25
1.5*1.5=2.25
(6.5)^2-(1.5)^2=42.25-2.25=40