Identify the independent and dependent variables. Suppose that the speed of a car, measured in miles per hour (mph), is monitored for some short period of time after the driver applies the brakes. The following table and graph relate the speed of the car to the amount of time, measured in seconds (sec), elapsed from the moment that the brakes are applied.
A. Independent: Speed in miles per hour
Dependent: Time in seconds
B. Independent: None
Dependent: Speed in miles per hour, Time in seconds
C. Independent: Time in seconds
Dependent: Speed in miles per hour
D. Independent: Speed in miles per hour, Time in seconds
Dependent: None
Answer: A
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