How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 1/28100.0*Average seed
Milford 2 Pinckney 28 -0.1
South Lyon 22.5 Pinckney 7.5 +0.0
Week of 2/5None
Week of 2/10None
Games Above .500
Chance Will Win Championship