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silvernight269:
in 1972, federal vehicle emission standards allowed 3.4 hydrocarbons released per mile driven. By 2007 the standards allowed only 0.8 hydrocarbons per mile driven. What was the rate of change from 1972 to 2007
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silvernight269:
@Vocaloid
silvernight269:
@dude @umm @Ultrilliam
umm:
About -0.07/year
silvernight269:
but how would i get that answer
silvernight269:
@Vocaloid
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umm:
make 1972 your starting point so y=0 and then the hydro your x so x=3.4 then you have (3.4,0) then 2007 is 35 years after 1972 so y=35 and x=0.8 (0.8,35) then use then point slope formula
silvernight269:
ok......
Ultrilliam:
@Mehek @dude
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