Lesson

Can you read information from a range of different graphs? What are all the different types you have seen so far? Look for keys or scales on a graph to help you understand what information is being presented.

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

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.

The media use data and graphs a lot, because graphs convey information in ways that make it easy to understand quickly. This video shows us some simple strategies to interpret graphs that you may be unfamiliar with.

Did you know most of your body is made of water?

This graph shows on average, the percent of water that different body parts are composed of, as well as the average total percent of water in the body.

a

What percentage of cells are made of water?

Worked Solution

b

What percentage more of your blood is water than is your muscles?

Worked Solution

Idea summary

When we see data in the media, we should look beyond what we first see. Some questions to ask include:

Who is publishing the data?

Do they have a reason to make the data look a certain way?

Has the data been displayed consistently?

Construct, interpret and compare a range of data displays, including side-by-side column graphs for two categorical variables

Interpret secondary data presented in digital media and elsewhere