T(d) is a function that relates the number of tickets sold for a movie to the number of days since the movie was released. The
average rate of change in T(d) for the interval d = 4 and d = 10 is 0. Which statement must be true?
The same number of tickets was sold on the fourth day and tenth day.
No tickets were sold on the fourth day and tenth day.
Fewer tickets were sold on the fourth day than on the tenth day.
More tickets were sold on the fourth day than on the tenth day.
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