The line graph illustrates the number of inquiries received by a city Tourist Information Office via three different methods—in person, by letter/email, and by telephone—between January and June 2011.
Overall, it is clear that in-person and telephone inquiries followed an upward trend, whereas the number of inquiries made by letter or email decreased significantly over the period. Notably, in-person visits became the most popular method of inquiry by the end of the six months.
In January, telephone inquiries were the most frequent at 900, followed by letter/email at 750, and in-person visits at 450. In-person inquiries grew steadily, reaching 800 by March and surging to 1,900 by June, making it the most common method. Similarly, telephone inquiries fluctuated initially, dipping to 800 in February before rising to 1,000 in March and April, and finally reaching 1,600 in June.
Conversely, inquiries by letter or email started at 750 in January and remained relatively stable until March at 700. Thereafter, this figure dropped consistently, falling to 550 in April and plateauing at 350 for the final two months of the period, representing the least used method by June.