How are these numbers calculated?

Big Games

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

Week of 5/7100.0*Average seed
Boavista 2 Nacional 2 -0.5
Sporting CP 1 Belenenses 3 -0.2
Tondela 2 Vitória Setúbal 1 +0.2
Estoril 1 Chaves 1 +0.1
Vitória Guimarães 1 Arouca 0 +0.0
Paços de Ferreira 0 Feirense 1 +0.0
Week of 5/14100.0*Average seed
Vitória Setúbal 0 Boavista 1 +1.1
Belenenses 1 Moreirense 1 +0.1
Porto 4 Paços de Ferreira 1 +0.1
Marítimo 1 Estoril 1 +0.1
Chaves 2 Rio Ave 2 +0.0
Week of 5/21100.0*Average seed
Sporting CP 4 Chaves 1 +0.2
Boavista 2 Benfica 2 +0.2
Points
Chance Will Win Championship