How are these numbers calculated?

Big Games

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

Saturday100.0*Average seed
Tri-City 3 Spokane 0 +0.2
Everett 3 Victoria 2 -0.2
Portland 7 Seattle 0 -0.2
Sunday100.0*Average seed
Tri-City 1 Seattle 6 +0.3
Portland 5 Everett 4 (so)+0.1
Points
Chance Will Make Playoffs