Topics
14. Data
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AustraliaNSW
Stage 2

14.02 Picture graphs

Lesson
Practice
Lesson

Are you ready?

Do you know how to keep a  tally  ?

Examples

Example 1

Rosey asks 15 of her friends what their favourite colour is. Here are their answers:

pink, blue, yellow, blue, green, pink, blue, blue, blue, pink, pink, blue, green, pink, blue

Count the number of each colour and fill in the table.

ColourNumber of friends
\text{Pink}
\text{Green}
\text{Blue }
\text{Yellow}
Worked Solution
Create a strategy

Count the number of times she wrote each colour and put that number in the box.

Apply the idea

The answers have pink 5 times, green 2 times, blue 7 times and yellow 1 times.

ColourNumber of friends
\text{Pink}5
\text{Green}2
\text{Blue }7
\text{Yellow}1
Idea summary

We can use a frequency table to write a summary of the results with the number of times each item occurs.

Picture graphs

Let's learn more about picture graphs in this video.

Loading video...

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.

This image shows a picture graph for sports votes. Ask your teacher for more information.

Each image represents 1 vote.

a

How many students are in the class?

Worked Solution
Create a strategy

Each image represents 1 vote by 1 student. Count the images in the graph.

Apply the idea
\displaystyle \text{Students}\displaystyle =\displaystyle 7+3+5+1Add the number of images
\displaystyle =\displaystyle 16
b

Which sport received the most votes?

Worked Solution
Create a strategy

Choose the sport that has the most images next to it.

Apply the idea

Basketball received the most votes.

Idea summary

Look at the key on a picture graph to help you understand what it is telling you.

Outcomes

MA2-18SP

selects appropriate methods to collect data, and constructs, compares, interprets and evaluates data displays, including tables, picture graphs and column graphs M

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