7055 wrote:Out of curiousity, how do you know this? Aren't the formulas for calculating credit scores highly guarded secrets?
The actual details and algorithm (because the devil is in the details) remains a secret. The breakdown of what percentage each category makes up your score is known, though. See this link from FICO:
Something to remember is that the graph is "on average". Someone with a long credit history probably isn't going to be affected very much by a single inquiry as someone with a thin file. Someone with maxed credit and a few derog's is going to be dinged more than someone with low utilization and a blemish free history.