There are many reasons why we might use graphs or charts. Generally speaking, they are a way of visualizing data, and can be useful for seeing patterns or trends.
For example, if we have a set of data that shows how many people use different types of transport to get to work, we might use a graph to show this. We could use a pie chart, which would show what percentage of people use each type of transport. Or we might use a bar chart, which would show how many people use each type of transport.
Both of these would be useful ways of visualizing the data. However, there are other reasons why we might use graphs or charts. For example, we might use them to compare two sets of data, or to see how data has changed over time.
In short, there are many reasons why we might use graphs or charts. They can be a useful way of visualizing data, and can help us to see patterns or trends.
