11.02 Picture graphs
Are you ready?
Do you know how to interpret information in a  table ?
Examples
Example 1
Avril asks her friends what they like to eat when they go out with their family. She puts her results in the following table.
| Food | Number of Friends |
|---|---|
| \text{Hamburger} | 4 |
| \text{Taco} | 5 |
| \text{Icecream} | 8 |
| \text{Kebab} | 3 |
How many friends did Avril ask?
Which food do Avril's friends like the least?
We can organise how many times something occurs in a table and use it to answer questions.
Picture graphs
This video shows what a picture graph is (also called a pictograph) and the key components of title, key, rows and columns. Here we will look at an example where each image represents one thing, such as a person or object.
Examples
Example 2
A class were asked to vote which sport they would like to play in their next lesson. The votes are shown in the picture graph.
Each image represents 1 vote.
How many students are in the class?
Which sport received the most votes?
Picture graphs display data using pictures. It is important to read the key to understand what each picture represents.
Key features of picture graphs
This video uses an example of a picture graph to understand all the important elements of this type of graph including the rows, columns, title and key. Here we will look at an example where each image represents more than one thing, such as a group of people or objects.
Examples
Example 3
A group of children are going to the mall and are asked, "What is your favourite shop?" This picture graph shows the store they chose.
Complete the frequency table below for the number of children.
| Store | Frequency |
|---|---|
| \text{Sweets store} | |
| \text{Games store} | |
| \text{Toy store} | |
| \text{Total} |
How many children prefer the Sweets shop over the Games shop?
If each picture in a picture graph represents more than 1 item, then we need to multiply the number if pictures by the number of items it represents to find the frequency.
Interpret picture graphs
This video shows us how we can use a picture graph to answer questions.
Examples
Example 4
It’s "Back to school" time and a shop recorded the number of pens they sold this week.
How many pens were sold on Wednesday?
How many more pens were sold on Saturday than on Wednesday?
Another name for a picture graph is a pictograph. These graphs use pictures to represent data. One picture can have a value greater than 1, so we need to check the key to make sure we know what it represents.