Can Velocity Be Negative When Acceleration Is Positive?

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Is it possible for velocity to be negative while the acceleration is positive? If so, then how is it possible?
 
on Phys.org
If you are rolling backwards in a car and put your foot on the gas pedal, you'll start accelerating forward instantly but until you come to a stop and start moving forward you'll have a negative velocity.
 
Sounds like a homework question...

Any object that has a negative velocity that is slowing down has a positive acceleration.
 

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