I need to create a simple formula for determining the popularity of an item based on votes and age.
Here is my current formula, which needs some work:
30 / (days between post date and now) * (vote count) = weighted vote
Whenever a vost is cast for an item it checks if its weighted vote is > 300. If an item has a weighted vote more than 300 then it is promoted to the front page of my website.
The problem is that this formula makes it very hard for older items to be promoted.
30 / 1 day * 10 votes = 300 (promoted)
30 / 5 days * 15 votes = 90 (not promoted)
30 / 30 days * 30 votes = 30 (not promoted)
30 / 80 days * 40 votes = 15 (not promoted)
How can I alter the formula to make it relatively easier for older items to be promoted (IE. make the above four weighted values fairly close together)?