Introduction to Data Interpretation
Direction: Following table gives details about the percentage change of the population in a particular town for given yea$ Go through the chart given and answer the questions that follow :
 What was the percentage increase in population of the town from 2005 to 2008?

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According to given bar graph , we have
Population of the town in year 2005 = 6%
Population of the town in year 2006 = 3%Single equivalent percentage increase for 2005 and 2006 = 6 + 3 + 6 × 3 % 100
Single equivalent percentage increase for 2005 and 2006 = 9.18%
Similarly,Single equivalent percentage increase for 9.18% and 4% = 9.18 + 4 + 9.18 × 4 % 100
Single equivalent percentage increase for 9.18% and 4% = 13.18 + 0.3672 ≈ 13.55%
Correct Option: C
According to given bar graph , we have
Population of the town in year 2005 = 6%
Population of the town in year 2006 = 3%Single equivalent percentage increase for 2005 and 2006 = 6 + 3 + 6 × 3 % 100
Single equivalent percentage increase for 2005 and 2006 = 9.18%
Similarly,Single equivalent percentage increase for 9.18% and 4% = 9.18 + 4 + 9.18 × 4 % 100
Single equivalent percentage increase for 9.18% and 4% = 13.18 + 0.3672 ≈ 13.55%Single equivalent percentage increase for 13.55% and 8% = 13.55 + 8 + 13.55 × 8 % 100
Single equivalent percentage increase for 13.55% and 8% = 21.55 + 1.08 ≈ 22.63%
 What was the population of the town in year 2009?

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On the basis of given graph in question ,We have only percentage increase in population, and no data about population in 2008 or elsewhere is available.
Correct Option: D
On the basis of given graph in question ,We have only percentage increase in population, and no data about population in 2008 or elsewhere is available.
Therefore , required answer can not be determined .
 Which year out of these 8 years has the highest population?

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As per the given bar graph ,
Clearly, in the year 2011 the population will be maximum as it increases each year.Correct Option: D
As per the given bar graph ,
Clearly, in the year 2011 the population will be maximum as it increases each year.
Hence , correct answer is option D .
 How many years witnessed a decrease in population across all the given years?

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On the basis of given graph in question ,
There is continuous increase in population as evident form the bar diagram.Correct Option: D
On the basis of given graph in question ,
There is continuous increase in population as evident form the bar diagram. So , required answer is 0 .
Direction: The graph shows the production of food grains of a country in different yea$ Study the graph and answer the questions.
 The two consecutive years in which rate of change of production of food grains is minimum are

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According to given bar graph , we have
Year 1981 ⇒ 35 from 30 (Increase)
Year 1982 ⇒ 20 from 35 (Decrease)
Year 1983 ⇒ 25 from 20 (Increase)
Year 1984 ⇒ 15 from 25 (Decrease)
Year 1985 ⇒ 30 from 15 (Increase)Correct Option: A
It is obvious from the graph.
Year 1981 ⇒ 35 from 30 (Increase)
Year 1982 ⇒ 20 from 35 (Decrease)
Year 1983 ⇒ 25 from 20 (Increase)
Year 1984 ⇒ 15 from 25 (Decrease)
Year 1985 ⇒ 30 from 15 (Increase)
By calculating percentage, answer can be found.
Hence , required answer is 1980 and 1981 .