## The Lesson

Imagine a teacher asked their class what their favorite colour was. The bar chart below shows how many students prefer each colour: We can read the heights of the bars to find out how many students preferred each colour.

## How to Read from a Bar Chart

Reading from a bar chart is easy. The values in our data set are shown along the horizontal axis. In our example, these are the favorite colours of the students. How many times each value appears in our data set (the frequency) is shown along the vertical axis. In our example, these are how many students prefer a colour. The height of the bar above each colour tells us how many students prefer that colour.

## Question

The bar chart below shows the favorite colours of students in a class. How many students prefer each colour? # 1

Look at the first colour. In our example, it is Blue. Read off the height of the bar above the colour. In our example, the height is 10. 10 students' favorite colour is blue.

# 2

Look at the next colour. In our example, it is Red. Read off the height of the bar above the colour. In our example, the height is 15. 15 students' favorite colour is red.

# 3

Look at the next colour. In our example, it is Yellow. Read off the height of the bar above the colour. In our example, the height is 10. 10 students' favorite colour is yellow.

We have read off the bar chart:
• 10 students' favorite colour is blue.
• 15 students' favorite colour is red.
• 10 students' favorite colour is yellow.

## Lesson Slides

The slider below gives another example of reading from a bar chart. Open the slider in a new tab