How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

Wednesday100.0*Average seed
Islanders 4 Costanzas 2 +0.2
Snipers 1 Dynasty 0 (ot)+0.1
Thursday100.0*Average seed
Giraffes 0 Islanders 12 +0.1
FridayNone
Points
Chance Will Make Playoffs