Help in term of nfl betting, pls!

[DarkNite]

I really don't understand the term " Race to 10 points"
Here is the line: ( I know this).
* Minnesota +4.5 1.91
* New Orleans -4.5 1.91

Race to 10 Points ( I don't know this)

* Minnesota 2.22
* New Orleans 1.64

Anybody can help?

[C-Gold]

Wouldn't it be the first team to score 10 points? Just bet the Saints to win and cover and don't worry about it.