

The graphs above show United States Census Bureau population figures for the year for various age groups, together with projections for the year
. Of the following age groups, for which is the projected percent increase in population from
to
greatest?
Select an Answer
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The correct answer is D.
To determine for which of the five age groups in the options the projected percent increase in population from to
is greatest, estimate the ratio of the projection for the year
to the population figure for
for each age group. Each of the ratios described is equal to
plus the decimal corresponding to the projected percent increase in population from
to
, so the greatest ratio will correspond to the greatest projected percent increase in population.
For the age group, the ratio is less than
, since the
projected population is less than
million and the
population is greater than
million. Thus the projected percent increase in population from
to
for this age group is less than
percent.
For the age group, the ratio is less than
, since the
projected population is less than
million and the
population is greater than
million. Thus the projected percent increase in population from
to
for this age group is less than
percent.
For the age group, the ratio is less than
, since the
projected population is less than
million and the
population is greater than
million. The projected percent increase in population from
to
for this age group is less than
percent.
For the year age group, the ratio is approximately
million to
million, or as a decimal,
, corresponding to an approximate
percent increase in population for this age group.
For the year age group, the ratio is approximately
million to
million, or as a decimal, approximately
, corresponding to an approximate
percent increase in population for this age group.
Therefore, the year age group has the greatest projected percent increase in population from
to
among the given options.