The line graph illustrates how many enquiries were received by the Tourist Information Office in a city from January to June in the year 2011.
Overall, there are increases in the number of enquiries being sent in person and by telephone, while a decline was seen in the figure for questions by letter or email. Another remarkable feature is that March marked the point where the use of direct enquires surpassed that of telephone.
The quantity of queries by telephone was generally the highest in the first 2 months, at 900, after which it saw a gradual rise to 1000 in March. Similarly, but to greater extents, direct questions, which was the least used in January on the chart, witnessed significant growth from just over 400 in the first month of the period to 1100 in mid-March, surpassing the figure for telephone. Meanwhile, that of letter or email experienced a slight fall in after 2 months, but still at around 700.
There are a stability in enquires received by telephone in 1 month from March, at 1000, and then it rises considerably to 1600 at the end of the period. A similar change was seen in the data for questions, which were sent directly, continued to grew at the same rate to 1900 until Jun. The number of enquiries received by letter or email dropped dramatically to end at under 400.