In 2006, 74.2 million tax returns were filed electronically. This represents 108.8% increase over the year 2005. How many income tax returns were filed electronically in 2005? Round to the nearest tenth of a million.

Answer 1

1.088x = 74.2 million

Solve for x.

Answer 2

According to The Washington Post, the number of heavy smokers declined
from 12.7 million in 2005 to 6.9 million in 2014. Let x be the year since
2005, and y be the number of heavy smokers in millions. Find the equation
of the line containing the points (0, 12.7) and (9, 6.9). Use your equation to
estimate the number of heavy smokers in 2019. Round your answer to the
nearest integer.
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