Learning Objectives:

__Bar Graph__

*Presenting Categorical Data Graphically: *

**Categorical **or **Qualitative** data are pieces of information that allow us to classify the objects under investigation into various categories.

*Bar Graph:*

A **Bar Graph** is a chart that uses either **horizontal or vertical bars** to show comparisons among categories.

*Construction of a Bar Graph:*

To construct a **Bar Graph,** we need to draw a **vertical axis** and a **horizontal axis**. The **vertical axis** will have a scale and measure the **frequency** of each category. The **horizontal axis** shows the categories. The **bar height** shows the **frequency.**

*Histogram**:*

A** Histogram** is bar graph that represents a **Frequency Distribution.** The width represents the interval and the height represents the corresponding frequency. There are no spaces between the bars.

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**Hook questions:**

*1. What is Bar graph?*

*2. How do you construct a Bar Graph?*

*3. What is Histogram?*

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