how our points get decreased??????

By asking questions & getting violations.

Here is an explanation of all points

http://answers.yahoo.com/info/scoring_system

1. Asking a question: -5 points.

2. Self-deleting an answer: -2 points.

3. Incurring a violation in a question: -10 points (subsequently deleted).

4. Incurring a violation in an answer: -12 points (-10 for the violation and -2 for the offending answer; subsequently deleted).

5. Losing an unsuccessful violation appeal: -10 points (in addition to the last two items).

Asking Question -5 points

Getting a violation - 10 points

Deleting an answer - 2 points

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To: Brian 2007

You will not lose points if you lose an appeal

It is not impossible to lose points here, in fac out of what everybody has answered you can lose points when the ways people here have already told you, and if you have viloated in anyway, Yahoo Answers will notify you, whether or not agree with it.

By asking questions and violations.