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13-10-2016
Mathematics

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HELP ME FELLOW BRAINS 40 PTS
The median weakly earnings for american workers in 1990 was $412 and in 1999 it was $549. Calculate the average rate(slope) of change between 1990 and 1999.

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13-10-2016

slope=rise/run
this one
slope=increase in money/increase in time

from 412 to 549 that is 137, increase 137
from 1990 to 1999, that is 9 years, increase 9 years
slope=$/t
slope=137/9
slope=15 and 2/9

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