Straight
The most common type of sports wager is on the final score of a single game, known as a straight wager. One team is typically favored over another by a pointspread; the favorite gives the underdog points as a head start, for betting purposes. The favorite is always indicated by a minus sign (-3) and the underdog by a plus sign (+3). The amount of points a customer must give or take is estimated to be the amount, which will generate equal wagering on both the underdog and the favorite. For betting purposes, the result of the game is determined by taking the actual score and subtracting points from the favorite's score or adding points to the underdog's score. So, a favorite can win the game but lose by not covering the spread and an underdog can lose the game but win it for betting purposes by covering the spread.
Totals
A customer can also bet whether the combined number of points or goals scored by the two teams in the game will be over or under the total set by the oddsmaker. For example, if the total is 42 and you believe that the combined points scored by the two teams will exceed that number, you would bet over. You would bet under if you believe the total points score will be less than 42.
Money Line
A money line is used in addition to or instead of a pointspread on a match up between two teams. If a money line, like Major League Baseball, determines a match up then it will cost the customer more to wager on the favorite. For example, the New York Yankees are a -150 favorite over the Colorado Rockies. In this example, the customer must lay $150 in order to win $100. If New York loses, the customer loses $150. However, the customer could bet on Colorado, in which case the customer would lay $100 in order to win $140 (10 cent line). If Colorado loses, the customer only loses $100, and if Colorado wins, the customer would win $140. Most sportsbooks offer both moneyline and pointspread options on most sports.