How are these numbers calculated?

Big Games

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

Week of 11/5100.0*Average seed
Manakau 3 Babas 0 -0.3
Jets 1 Hawks 9 -0.2
Hawks 1 Otaki 2 +0.2
Manakau 1 Jets 5 +0.1
Choppers 4 Babas 4 -0.1
Choppers 0 Manakau 8 -0.1
Babas 2 Masters 2 -0.0
Hawks 2 Choppers 2 +0.0
Points
Chance Will Win Championship