Types of Graphs - mouillesseaux.weebly.commouillesseaux.weebly.com/.../types_of_graphs_notes.pdf ·...
Transcript of Types of Graphs - mouillesseaux.weebly.commouillesseaux.weebly.com/.../types_of_graphs_notes.pdf ·...
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TYPES OF GRAPHS And their importance in Science
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Why do we use graphs? • They help us visualize data • They help us see patterns
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What are the different types of graphs?
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Scatterplot • Used when correlating two sets of data • Example: Height and weight of children • Shows you the relationship between two variables • Line is drawn through the average
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Histogram • Shows you the distribution of data • Groups numbers into ranges
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Bar Graph • Comparing categories or groups
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Bar graph vs histogram Bar graph
• Gaps • Categories
Histogram • No gaps • Numbers
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Pie chart • When showing parts of the whole • Percentages
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Line graph • Shows change or growth over time
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What kind of graph would you use for each situation? Month Average High Temp # of Flu cases reported
January 55 156 February 60 123 March 67 85 April 73 60 May 82 34 June 92 20 July 95 15 August 99 17 September 85 25 October 72 45 November 64 78 December 56 95
1. Average high temperature throughout the year
2. How the average high temperature and flu rate are related
3. What percent of the population had the flu each month
4. How many people had the flu each month
Line Graph
Scatter plot
Pie chart
Bar graph
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How to draw a graph • Independent (manipulated) variable on the x-axis (horizontal) • Dependent (responding or measured) variable on the y-axis
(vertical) • Label each axis and be sure to include units of measurement • The title should describe what the graph is about • All numbers should be spaced evenly
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How can you improve this graph?