How are these numbers calculated?

Big Games

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

Wednesday100.0*Pres Trophy100.0*Average seed
Dallas Stars 3 Chicago Blackhawks 2 +2.8
Thursday100.0*Pres Trophy100.0*Average seed
New York Islanders 2 Washington Capitals 3 -59.6
-0.4
Tampa Bay Lightning 1 Boston Bruins 2 +9.9
+0.2
Vancouver Canucks 2 St. Louis Blues 3 -4.4
Points
Chance Will Make Playoffs