Math behind IP earning

[quote=TheKut]I was wondering how long your games would have to be to make the most IP per minute. Do you earn more per minute for a long game or a short game? Or is it the same?[/quote]

[quote=utopus][url=http://leagueoflegends.wikia.com/wiki/Influence_Points]Some light reading for you[/url] IIRC, the fastest way to grind IP is by way of dominion i think. Summoner's rift technically does make more IP/min, but dominion actually makes up for that through the extra IP won through winning. It is important to note that winning a game in summoners rift in under 25 minutes, reduces the IP you get to 75%[/quote]

[quote=Shunpaw]Hey dude! :) That should kinda answer your questions: Win 2.305 IP per minute up until 55 minutes. 18 IP bonus for completing a match (~7.8 minutes worth of IP) Loss 1.402 IP per minute up until 55 minutes. 16 IP bonus for completing a match (~11.4 minutes worth of IP) So its always worth trying to get a 55 minute game :)[/quote]

[quote=TheKut]So basically, a game on Summoner's Rift is equally IP/minute efficient between 25 and 55 minutes?[/quote]

[quote=utopus]well if you take into account the base IP you get from finishing a game, it could be argued that the total IP/min dimishes slightly as the time spent in game increases[/quote]

[quote=Meiyjhe]If you want to get the most IP in the least time, you would have to win all your games by making the enemy surrender at 20. You basically get 5 minutes worth of IP for free if that makes sense. Not that winning all matches at 20 is easy tho :3[/quote]