28. while the number for the general adult population is decreasing, it is not decreasing equally across all sub populations
for the 18-to-24 age group
the number of smokers for the general adult popula-
is decreasing, it is not decreasing equally across all sub-
lations (and for some groups it is actually increasing).
the 18-to-24 age group, the number of smokers was 8
million in 1965 and 6.3 million in 2009. (source: “trends
tobacco use, american lung association, 2011.) as-
ning the number of smokers in the 18-to-24 age group
continues decreasing according to a negative linear growth
model,
lol predict the number of smokers in the 18-to-24 age
group in 2015 (round your answer to the nearest thou-
sand).
(b) predict in what year the number of smokers in the
18-to-24 age group will reach 5 million.