Red,
Those are money lines, i.e., if you want to bet the game with no point spread.
The number with a minus is the favorite.
The number with the plus is the underdog.
Example:
Duke is -210 vs NC +175 tonight.
So, if you want to bet Duke tonight to just win the game with no point spread, you have to lay $210 to make $100.
Conversely, if you want to bet NC to win the game outright, again, no point spread, you only have to lay $100 and it pays $175 if you win.
Got it?