Line of regression statistics problem

Hello,

I dont know if the place for my question is here, but i will be thankful if someone help me.

I have a problem with deciding which of these polynoms or best describes the data i have (first column is for count of eggs and the second colum is for length of tirtle (mm)):

I know that i have to get the error and decide. I have this information about the 2 polynoms. But i dont know if im doing it wrong.

and