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 SReceipts 3. 50.306 6. 31.28 16.24 12 6.526 15 0.98 18 0.92 0.335 21 24 0.076 27 0.044 Estimate the instantaneous rate of change of daily receipts 9 weeks after the opening day.

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