Lesson

Can you read information from a column graph or picture graph ? Look for keys or scales on a graph to help you understand what information is being presented.

The column graph shows the number of each type of car fixed by the local mechanic.

a

Which car brand does the mechanic fix most often?

Worked Solution

b

How many Holden or Toyota cars did the mechanic fix in total?

Worked Solution

Idea summary

For column graphs:

- Check the scale of the graph. It may not always be 1.
- If there is no column drawn, it represents a value of 0.

Look at the **key** on a picture graph to help you understand what each image is representing.

This video looks at how we can display the same data different ways using different graphs.

A group of children are going shopping and are deciding which shop to visit first. This table shows the shops the children like best.

a

How many children like the toy shop best?

Worked Solution

b

Complete the column graph to show the same data as the table.

Worked Solution

Idea summary

We can draw a new type of graph for the data shown in an existing graph. e.g. We can draw a column graph to show the same data from a picture graph.

This video shows us how to answer questions from graphs.

The pie graph below shows the results of a class survey where students were asked to nominate their favourite food:

a

Which was the most popular food?

Worked Solution

b

Which food was as popular as noodles?

Worked Solution

Idea summary

When we use graphs, we need to figure out what it is telling us. We can use colours or pictures, or the size of a piece of the pie graph. We may also have labels on the graphs, so we need to check each graph to see what information we can use.

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