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Before watching the videos, think about and answer these questions to the best of your ability.

Ana left home to go on a bike ride. Let represent Ana’s velocity (in miles per hour) hours after she left home. Which of the following best describes the meaning of ?
The change in Ana’s velocity from 0.5 hours to 2 hours after she left home. The change in Ana’s distance away from home from 0.5 hours to 2 hours after she left home. Ana’s average speed from 0.5 hours to 2 hours after she left home. Ana’s distance away from home 1.5 hours after she left home.
If and are constants, which of the following expressions is equal to ?