ABSTRACT In today’s world online rating systems are extensively used for making their decisions on a particular product or item on the web. For getting benefit, some people are always trying to manipulate corresponding systems by giving unreasonable ratings. So, resolving true ratings of such products comes extremely important and it is a crucial problem. Fake reputation is the problem that is being occurred by unreasonable ratings. In this paper we propose Multi linear regression algorithm in machine learning which will give correct reputation by eliminating unreasonable ratings.