How are these numbers calculated?

Big Games

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

Week of 4/4None
Week of 4/12100.0*Average seed
Clarke Central 8 Salem High Scho 1 +0.1
Week of 4/18100.0*Average seed
Flowery Branch 1 Cedar Shoals Hi 0 -0.0
Heritage High S 5 Loganville High 2 -0.0
Points
Chance Will Make Playoffs