Lesson 25 — Activity 2:

A Review of Charts



Now that you have learned how to read information from tables, let's review how to read data from charts.

A pie chart is a special chart that uses "pie slices" to show relative sizes of data.

For example, imagine you just did a survey of your friends to find which kind of movie they liked best.

Here are the results:


You can display this information from the above table in a pie chart.


As you can see by looking at the pie chart, this is an easy way to see which movie types are most liked and which are least liked, at a glance. Note that there are percentages after each type of movie. This represents the part (percent) of the total chart. For example, according to the chart above, only 5% of your friends like to watch dramas, while 25% like to watch action movies. All parts of the chart must add up to 100%. This is done in the example above (20% + 20% + 25% + 30% + 5% = 100%).

Now let's practise reading information from a pie chart. Take a look at the pie chart below, and then answer the questions that follow.


  1. About what percent of singer popularity did Enrique receive?
  2. How many people voted for Akon?
  3. How many people voted for Jennifer Lopez?
  4. How far in front of Pitbull is Enrique?
  5. What percentage voted for Britney Spears as their favourite singer?



  1. Enrique received 31% of the popular vote.
  2. Twenty-one percent voted for Akon.
  3. Twenty-four percent voted for Jennifer Lopez.
  4. Enrique is in front of Pitbull by 21%.
  5. Fourteen percent voted for Britney Spears as their favourite singer.


  Self-check!

Try This!

Look at the pie chart below, and then answer the questions that follow.

Questions

  1. What percentage of people chose grapes as their favourite fruit?
  2. What percentage of people chose apples?
  3. Which is a more popular fruit, oranges or apples?
  4. What percentage of people chose mangoes as their favourite fruit?
  5. Which fruit was the most popular?



  1. Fifteen percent of people chose grapes as their favourite fruit.
  2. Nine percent of people chose apples.
  3. Apples are a more popular fruit.
  4. Twenty-six percent of people chose mangoes as their favourite fruit.
  5. Strawberries are the most popular fruit.



Digging Deeper!

Click on the Play button below to watch a video on how to read pie charts.


Images courtesy of www.imagesgoogle.com