Answer :b) pictograph

A pictorial representation of data is called a pictograph.
A pictograph is a type of graph that uses pictures or symbols to represent data. It is a visual way of presenting information in a more engaging and easy-to-understand manner. Pictographs are commonly used to represent numerical data or to compare different categories.

Pictographs are made up of two main components: the symbols or pictures representing the data, and a key or legend that explains what each symbol represents. The symbols used in a pictograph can be simple pictures, icons, or graphical representations that are relevant to the data being presented.

Pictographs are particularly useful when dealing with data that has distinct categories or when comparing different groups. They provide a visual representation that allows for quick interpretation and comparison of data points. Pictographs can also be used to highlight trends or patterns in the data.

Here are some key points about pictographs:

1. Visual representation: Pictographs use pictures or symbols to represent data, making it easier for people to understand and interpret the information.

2. Key or legend: A key or legend is included in a pictograph to explain what each symbol represents. This helps viewers understand the meaning behind each picture or symbol.

3. Categories: Pictographs are often used to represent data that falls into distinct categories. Each category is represented by a different symbol, making it easy to compare and contrast the data.

4. Comparison: Pictographs are useful for comparing different groups or categories. By visually representing the data, it becomes easier to identify patterns or trends among the different groups.

5. Engaging: Pictographs are visually appealing and can capture the viewer's attention more effectively than plain text or numbers. This makes them a popular choice for presenting data in a more engaging and memorable way.

In summary, a pictorial representation of data is called a pictograph. Pictographs use pictures or symbols to represent data in a visually appealing and easy-to-understand manner. They are particularly useful for comparing different categories or groups and can help identify patterns or trends in the data.