How are these numbers calculated?

Big Games

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

Week of 1/31100.0*Average seed
Broad Run 5 Dominion/Potomac Falls 4 -0.4
Patriot 10 Battlefield 7 +0.1
Week of 2/7100.0*Average seed
Riverside 9 South Lakes 0 +0.0
Week of 2/14None

What If

Chances based on how well the Riverside finish out the regular season.   Explain

If finish:Chance inChance will finish regular season at seed

* Row combines multiple less frequent records.

Games Above .500
Chance Will Make Playoffs