alleryA car moves at constant speed. Distance is directly proportional to time, so the constant of proportionality is the
Aspeed
Btime
Cforce
Dheight
Answer & Solution
Correct answer: A. speed
1. At constant speed, distance = speed x time.
2. This has the form y = kx with distance as y and time as x.
3. So k is the speed, not the time or acceleration.
_Source: Wikipedia, Proportionality (mathematics), Examples_
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