hannahmxx2
04.02.2020 •
Mathematics
Rock music accounted for 30.5% of the total sales of recorded music in 1999 , and 20.4% of the total sales of recorded music in 2009 . find the average rate of change of the percentage of sales of rock music from 1999 to 2009 .
round to the nearest hundredth of a percent. note that the percentage sign is already given in the answer, so you do not need to enter it.
the average rate of change is
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Ответ:
Strong positive correlation