Final answer:
The quarterback's total displacement from the line of scrimmage is 10 yards backward.
Step-by-step explanation:
The quarterback's total displacement from the line of scrimmage is 10 yards backward.
Displacement refers to the change in position of an object from its starting point to its ending point. In this case, the quarterback starts at the line of scrimmage and runs backward for 10 yards. Since he is moving in the opposite direction from the line of scrimmage, the displacement is negative, indicating a backward movement.