The graph below shows the number of inquiries received by the Tourist Information Office in one city over a six-month period in 2011. Summarize the information by selecting and reporting the main features and make comparisons where relevant.

The graph gives information about the number of inquiries received by the Tourist Information Office in one city over a six-month period in 2011.

Overall

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,

while

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the three ways of inquiry exhibited different trends over the given period, two followed an upward trajectory,

whereas

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the other one showed a decline.

However

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, the rates of increase and decrease varied significantly between them. As the graph shows, in

person

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people

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stood at slightly over 400 in January, and rose steadily to around 800 in February,

subsequently

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grew dramatically to almost 1900 by June. Followed by telephone, it began at nearly 900 in January,

then

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dropped moderately to 800 in February,

thereafter

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increased rapidly to just 1000 in March and remained unchanged until April, before climbing drastically to 1600 by June.

By contrast

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, by letter/email commenced at slightly under 800 in January,

then

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fell slowly to just above 300

at the end

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of the period.