Farrooh F. answered • 01/13/17
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First find X: "years after 1980". Since it asks for 1994, we have X = 1994 - 1980 = 14, i.e. 14 years past since 1980.
Now use the formula:
Now use the formula:
y = -0.7x + 33 = -0.7*14 + 33 = -9.8 + 33 = 23.2
Thus: the percentage of men, y, smoking cigarettes is 23.2%.
Thus: the percentage of men, y, smoking cigarettes is 23.2%.
Farrooh F.
tutor
Its physical meaning of "33" is that in the year of 1980, 33% of people smoked cigarettes.
This model also suggests that if true, in the year of 2027 and onwards nobody would smoke cigarettes.
This model also suggests that if true, in the year of 2027 and onwards nobody would smoke cigarettes.
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01/13/17
Dalia C.
It means 33% of men were smoking in 1980 at the start of survey.
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01/13/17
Ashley B.
01/13/17