In sports wagering terms, a line is a point spread. It gives players a chance to place a bet without choosing a team. Say, for example, you place a bet of -7.5 on Team Green. In this case, Team Green must win by at least eight points for you to win. A bet of +7 for Team Blue, the underdog, means Team Blue can lose by seven or fewer points for you to win. You also win the wager if Team Blue wins the game.