## CBSE Class 6 Maths Notes Chapter 9 Data Handling

In our day to day life, we see various kinds of tables which consist of numbers, figures, names, etc. These tables provide ‘Data’. Data is a collection of numbers gathered to give some information.

**Recording Data**

Sometimes some information is required very quickly. It is possible only when we adopt some suitable system of collecting data.

Raghav | Banana |

Preeti | Apple |

Amar | Guava |

Bawana | Apple |

Manoj | Banana |

Donald | Apple |

Fatima | Orange |

Raman | Banana |

Radha | Orange |

Rarida | Guava |

Anuradha | Banana |

Rati | Banana |

Maria | Banana |

Akhtar | Orange |

Ritu | Apple |

Salma | Banana |

Kavita | Guava |

Javed | Banana |

**Organising Data**

If we want to get particular information from the given data quickly, die data can be arranged in a tabular form using tally marks.

**Pictograph**

A pictograph represents data in the form of pictures, objects or parts of objects. The picture usually helps to understand the data. It helps answer the questions on the data at a glance. Pictographs are often used by dailies and magazines to attract the attention of the readers. However, it requires some practice to understand the information given by a pictograph.

**Interpretation of a Pictograph**

Simply by observing a pictograph, one can answer the related questions very quickly.

**Drawing a Pictograph**

We draw pictographs using symbols to represent a certain number of items or things.

**A Bar Graph**

Representing data by pictograph is tedious and time-consuming. So, a bar graph supplies with another way of representing data visually.

In a bar graph or a bar diagram, bars of uniform width is erected horizontally or vertically with equal spacing between them. The length of the bar gives the required information.

**Interpretation of a bar graph**

Looking at the bar graph; we can answer the related questions quite easily.

**Drawing a Bar graph**

First of all, we draw a horizontal line and a vertical line on the horizontal line, we drawbars and on vertical line, we write the numerals. However, we choose a proper scale. For example, 1 unit =100 students. Good practice helps reading a given bar graph a lot.