How are these numbers calculated?

Big Games

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

Week of 5/16100.0*Chance wins title
Sturm Graz 0 Salzburg 0 Yes
Rapid Wien 4 Austria Wien 1 -0.2
Altach 2 Salzburg 2 +0.0
Week of 5/24None
Week of 5/31None
Points
Chance Will Win Championship