It depends on your opponents rating: against lower rated opponents you lose many points, strong opponents not many.
POINTS SYSTEM

Hi can anyone tell me how it works when i resign a game sometimes i have lost 60 points then other times i have only lost 11 or 4 points and sometimes even fewer.thankyou
Here is the exact link to how they work on this site - enjoy http://www.chess.com/article/view/chess-ratings---how-they-work

It depends on the rating of your opponent. You lose more points if you resign against lower rated opponents than if you resign against higher rated opponents.
Hi can anyone tell me how it works when i resign a game sometimes i have lost 60 points then other times i have only lost 11 or 4 points and sometimes even fewer.thankyou