This is a single wager on a selected side or over/under. The team wagered on must beat the point spread given at the time of the wager.
The official line when a wager is placed is the line the bettor will receive when the game starts. If the line moves after his/her bet has been placed, they will be unaffected. In a straight wager, the bettor places his/her stake down on one team to either win or lose while covering the point spread. An underdog will have higher odds and therefore a higher payout, but the favorite is more likely to win. A point spread helps to even the odds for the underdog by giving them a certain number of points to start the game (for betting purposes only). A straight wager is what most people equate with betting on sports.