Answer
Dependent variable : speed
Independent variable: time
Work Step by Step
This is because the car speed is depending on the time the car has been driving for, which means speed is the dependant variable.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.