Consider these statements written in ordinary language:
A The speed of the car is proportional to the distance it
has traveled.
B The car is speeding up.
C The car is slowing down.
D The car always travels the same distance in the same time interval.
E We are driving backwards.
F Our acceleration is decreasing.
Denoting by the distance covered by the car at time ,
and letting denote a constant, match these statements with the
following mathematical statements by entering the letters A through F
on the appropriate boxes:
is constant

In order to get credit for this problem all answers must be correct.