What is the purpose of pie-graph?

Here's how it works:

* The whole: The entire circle of the pie chart represents the total amount of something (e.g., total budget, total population, total sales).

* The slices: Each slice of the pie represents a specific category within the whole. The size of each slice is proportional to the percentage that category represents.

Why use a pie chart?

* Easy to understand: Pie charts are simple and intuitive, making it easy for viewers to grasp the relative sizes of different categories.

* Great for comparisons: You can easily compare the proportions of different categories at a glance.

* Highlights key data: The largest slices immediately draw attention to the most significant categories.

Limitations of pie charts:

* Difficult for complex data: Pie charts can become confusing when there are too many categories (more than 5-7 is usually not recommended).

* Not good for showing trends: They are best for showing proportions at a single point in time, not for showing changes over time.

* Can be misleading: The angles of the slices can be deceiving, especially when the proportions are very small.

In summary: Pie charts are excellent tools for visualizing and comparing proportions of a whole. They are most effective when used for simple data with a limited number of categories.