Question 269547: in 1990, 25.3% of adults in the US were smokers. In 2002, the percentage of adults who were smokers was 22.5%. Let y=the percent of adults who are smokers in the US and x=the numbersof years since 1990(i.e. x=0 corresponds to 1990).
Use the form y=mx+b. write an equation relating the two.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! in 1990, 25.3% of adults in the US were smokers.
In 2002, the percentage of adults who were smokers was 22.5%.
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Let y=the percent of adults who are smokers in the US
and x=the numbers of years since 1990(i.e. x=0 corresponds to 1990).
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Use the form y=mx+b. write an equation relating the two.
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Intercept = f(0) = 25.3%
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slope = (22.5-25.3)/12 = -2.8/12 = -0.23
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y = -0.23x + 25.3 where y is in percent
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Cheers,
Stan H.
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