How are these numbers calculated?

Big Games

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

Week of 2/21100.0*Average seed
Central Oklahoma 4 Oklahoma 2 +0.5
Oklahoma 2 Central Oklahoma 3 +0.4
Week of 2/28100.0*Average seed
Arizona 3 Arizona State 1 +0.4
Arizona 3 Arizona State 2 +0.2
Points
Chance Will Win Championship