Computers are not supposed to be biased and use straight numbers and/or whatever formula is inputted, so technically there is some sort of bias as a human has to make the formula which the computer spits out.
This brings us to the very first FPI (Football Power Index) from ESPN for the 2017 season and here is its formula.
The model comprises four major components: the last four seasons of performance on offense, defense and special teams, with the most recent season counting most; information on offensive and defensive returning starters, with special consideration given to a team returning its starting quarterback or gaining a transfer quarterback with experience; a four-year average recruiting ranking of four systems (ESPN, Scouts, Rivals and Phil Steele); and head coaching tenure.