The following table shows the daily receipts in millions of dollars of the movie "Avatar" for successive Fridays after its opening on Friday 18 December 2009. Weeks 3 6 9 2532 12 15 18 21 24 27 $Receipts 50.306 31.28 16.24 6.526 0.98 0.92 0.335 0.076 0.044 Estimate the instantaneous rate of change of daily receipts 9 weeks after the opening day.

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Exponential Growth Model

The relation that represents an exponential function is: