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Communicating Through Graphs Column Graph Line Graph Sector or Pie Graph.

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Presentation on theme: "Communicating Through Graphs Column Graph Line Graph Sector or Pie Graph."— Presentation transcript:

1 Communicating Through Graphs Column Graph Line Graph Sector or Pie Graph

2 What Do Graphs Show? Column Graph Column Graph Each line of information is in a column. Each column touches the adjoining columns. Each column is the same width.

3 Line graph Line graph A continuous line joins the dots. Best suits information which is continuous. Eg. Information involving measurement (length, weight, etc)

4 Step Graphs Step graphs links 2 lines of information in a 90 degree relationship. Step graphs links 2 lines of information in a 90 degree relationship. Often used to display information on sales or usage over a period of time. Often used to display information on sales or usage over a period of time.

5 Divided Bar Graph A divided bar graph shows how the parts of a particular bar make up the whole. A divided bar graph shows how the parts of a particular bar make up the whole. As an example, the total number of shoes sold may be divided into how many were from the different distributors. As an example, the total number of shoes sold may be divided into how many were from the different distributors.

6 Conversion Graphs A conversion graph changes one quantity to another. A conversion graph changes one quantity to another.conversion graph conversion graph It is a useful tool for changing units of measurement, money, clothing sizes, etc. It is a useful tool for changing units of measurement, money, clothing sizes, etc.

7 Sector Graph Sector Graph Sector Graph Sector Graph (also known as Pie Graph) (also known as Pie Graph) Each sector shows the fraction of the total for each piece of data. Each sector shows the fraction of the total for each piece of data. Each sector is often shown as a percentage of the whole circle. Each sector is often shown as a percentage of the whole circle.

8 When to Use Which Graph What information do you want to emphasise? What information do you want to emphasise?eg Which occurred most often? Which occurred most often? What is the difference between the data (range)? What is the difference between the data (range)? How much information is needed to be identified? How much information is needed to be identified?eg Is a visual appearance enough? Is a visual appearance enough? Is the pattern of results sufficient? Is the pattern of results sufficient?

9 Tables and Graphs A graph will give a quick visual appearance of the information contained in the table. A graph will give a quick visual appearance of the information contained in the table. However, a table will give you exact information whereas a graph may only give you approximations for the given information. However, a table will give you exact information whereas a graph may only give you approximations for the given information. Results of a Maths Test MarksNumber of students

10 Misleading Graphs Graphs can be made to be very misleading by: Graphs can be made to be very misleading by: Not starting the vertical axis at zero. Not starting the vertical axis at zero. Using an inappropriate or no vertical scale. Using an inappropriate or no vertical scale. Using 3-D shapes and comparing volumes. Using 3-D shapes and comparing volumes.

11 Bibliography Images provided by Microsoft Online Clip Art* Images provided by Microsoft Online Clip Art* -us -us -us -us A Maths Dictionary for Kids A Maths Dictionary for Kids ry.html ry.html ry.html ry.html Unit 3 Section 6: Conversion Graph Unit 3 Section 6: Conversion Graph k7/bk7i3/bk7_3i6.htm k7/bk7i3/bk7_3i6.htm k7/bk7i3/bk7_3i6.htm k7/bk7i3/bk7_3i6.htm © Copyright NSW Department of Education and Training © Copyright NSW Department of Education and Training * Other names and brands may be claimed as the property of others. * Other names and brands may be claimed as the property of others.


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