The number of passengers on an airline rose fairly steadily from about 200 000 in 2005 to
about 350 000 in the year 2010.
a How many years are there from 2005 to
2010 inclusive?
b What was the average increase in the
number of passengers per year?
c Estimate the total number of passengers
from 2005 to 2010 inclusive.​

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Explanation:

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I believe the answer is: a. Most Europeans are employed in the mining industry.

The most employees during that time work in either railroad and automobiles industry. Since a lot of them used product from the mining industry, people often mistake them. The industry started to shifted from railroad into textile and consumer goods in the mid 1900s.