Lesson 14

• Natuurkunde / Scheikunde
• Middelbare school
• havo, vwo
• Leerjaar 2

4.5 Graphs and tables

Learning goals

• Explain what is meant by a continuous variable and a discrete variable.

•  To know in what case to use a pie chart, bar chart or graph.

tables and graphs – Exercise

1. Read 4.5

2. Give a definition in your own words for the following concepts:

• Discrete variable – give an example.
  
• Continuous variable – give an example. 
  
•  Categoric variable – give an example
  
•  Bar chart – also draw an example of a bar chart.
  
• Pie Chart – also draw an example of a pie chart.
  

Discrete variable

• A variable which you can only express in whole numbers. 
• Example: The number of goals in a soccer match

Continuos variable

• A variable that can take any number. 
• Example: the temperature in a room.

Categoric variable.

• A variable that is not expressed in numbers. 
• Example: the names of players in a sports match.

Bar chart

Pie Chart

Exercise

1. In your notebook write down:

• Discrete variable
  
• Categoric variable
  
• Continuous variable
  

2. Behind each variable, write down which type of graph you use for it.

•  Graph
• Bar chart
• Pie chart

Discrete variable

Categoric variable

Continuous variable

Discussing the exercises

• Yellow block exercises 4.5
  
• Workbook exercises 4.5 
  

Working independently

• Start to study §4.1 - 4.5
  
• Do the Review questions in §4.7
  

Learning goals

• Explain what is meant by a continuous variable and a discrete variable.

•  To know in what case to use a pie chart, bar chart or graph.