Lesson

Can you read information from a range of different graphs? We have seen picture graphs, dot plots, column graphs and bar graphs. 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?

A

BMW

B

Mitsubishi

Worked Solution

b

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

Worked Solution

Idea summary

Check the scale on a column graph. The ticks or marks may not always be worth 1.

This video recaps how to answer questions from tables, picture graphs or column graphs, and how these strategies can be used to interpret the data on any kind of graph. Even those that are unfamiliar.

A marketing company conducted a survey to determine the market share of smartphone manufacturers. They surveyed 4000 people, and the results are given in the table below:

Manufacturer | Responses |
---|---|

\text{Apple} | 2051 |

\text{Samsung} | 967 |

\text{Huawei} | 531 |

\text{Other} | 451 |

Which pie chart most accurately represents this data?

A

B

C

D

Worked Solution

Idea summary

Pie graphs show the portion that each category takes up out of the whole. The most popular category will have the biggest piece.

This video looks at some examples of line graphs with whole number values on the y-axis. It also shows the important features of the graph and how to create one.

A dachshund puppy is weighed every two weeks.

Week | 2 | 4 | 6 | 8 |
---|---|---|---|---|

Weight (kg) | 1 | 4 | 5 | 5 |

a

Construct a line graph of the information given in the table.

Worked Solution

b

How much weight had the puppy gained from week 2 to week 4?

Worked Solution

c

In which weeks did the puppy's weight not change?

A

From week 4 to week 6.

B

From week 6 to week 8.

Worked Solution

Idea summary

We can use different kinds of graphs to show data, and some graphs are more suitable than others. In each case, we need to read the heading to see what the graph is showing us, as well as how our graph is labelled.

uses appropriate methods to collect data and constructs, interprets and evaluates data displays, including dot plots, line graphs and two-way tables