Question

The following graph shows the number of visitors (in millions) visiting the famous Salarjung Museum in Hyderabad between 2000 and 2010 as well  as the number of visitors expected to visit it in the next ten years.

Answer 1

Number of Visitors to the Salarjung Museum (Hyderabad) in Millions

We can describe the information in the graph in the following way:
(Study the verb forms carefully)

In 2000, the number of students visiting the museum was 2. 75 million.
By 2010 the number had risen to 4 million.
If we are referring to figures for the current year we can say:
The number has risen marginally.
If we are predicting figures for the future we can say:
By 2020, the number will have risen to 7 million students OR
It is estimated /predicted that the number will rise to ........ .