The line graph presents data on inquiries received by the Tourist Information Office in one city over a six-month period in 2011. Overall, it is clear that in-person inquiries increased dramatically, while inquiries made by letter or email decreased sharply, and telephone inquiries fluctuated slightly before trending upward.
In January, telephone inquiries were the highest at around 850, followed by inquiries made in person at approximately 390, and those made by letter or email at about 790. From January to March, in-person inquiries rose moderately from 390 to 800. In contrast, inquiries made by letter or email saw a slight decline, decreasing from 790 to 700. Meanwhile, the number of telephone inquiries fluctuated significantly, ranging from 900 to 1000.
From March onward, in-person inquiries continued to rise significantly, reaching a peak of around 1900, surpassing the other two categories. Telephone inquiries remained steady for a month before experiencing a substantial increase from 1000 to 1600. In contrast, the number of inquiries made by letter or email fell sharply throughout the period, dropping from 790 to 390, making it the lowest among the three categories.