Final answer:
The motion of a car can be described as having either positive or negative velocity and acceleration depending on which direction it is moving (right or left) and whether it is speeding up or slowing down.
Step-by-step explanation:
The description of the motion of the car can vary depending on its direction and whether it is speeding up or slowing down. Using the information provided, when a car is moving towards the right and speeding up, it exhibits positive velocity and positive acceleration. Conversely, if it is slowing down while moving to the right, it has a positive velocity but negative acceleration. When a car is moving to the left and slowing down, it is considered to have a negative velocity and a positive acceleration due to its velocity becoming less negative over time. Finally, a car moving to the left and speeding up has both a negative velocity and negative acceleration as both the direction of motion and acceleration are the same.