How are these numbers calculated?

Big Games

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

Week of 4/6100.0*Average seed
Rush 7 Mammoth 9 -0.5
Rock 10 Knighthawks 9 -0.1
Wings 15 Swarm 13 +0.1
Week of 4/13100.0*Average seed
Rush 14 Knighthawks 10 +0.5
Stealth 10 Bandits 15 +0.2
Wings 10 Rock 9 +0.2
Roughnecks 14 Knighthawks 15 -0.1
Week of 4/20100.0*Average seed
Rush 11 Roughnecks 12 -1.5
Stealth 17 Wings 13 -0.2
Games Above .500
Chance Will Make Playoffs