For a driver, the time between seeing a stoplight and stepping on the brakes is

Question

For a driver, the time between seeing a stoplight and stepping on the brakes is called reaction time. The distance traveled during this time is the reaction distance. Reaction distance for a given driver and vehicle depends linearly on speed.
a. Would the graph of reaction distance versus speed have a positive or a negative slope ?
b. A driver who is distracted has a longer reaction time than a driver who is not. Would the graph of reaction distance versus speed for a distracted driver have a larger or smaller slope than for a normal driver? Explain

Explanation / Answer

a) Positive. As speed increases, reaction distance increases.
b) Larger. The driver who was distracted would have a longer reaction time and thus a greater reaction distance at a given speed.

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