Chapter 1, Section 3: Communicating with Graphs

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Chapter 1, Section 3 Communicating with Graphs

• (C.P. Exploring Science)

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GRAPHS

• A visual display of information or data
• Why use graphs?
• They show patterns in data better than a table

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GRAPHS

• Graphs make understanding the data easier
• With graphs, you can see patterns and trends and
  make conclusions

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Race/Ethnicity AP Examinee Population
Asian, Asian American or Pacific Islander 10.2
Black or African American 8.2
Hispanic or Latino 15.5
American Indian or Alaska Native 0.6
White 59.4
Not reported/other 6.1

• Which display is easier to understand?

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GRAPHS

• What are the three common types of graphs?
• LINE, BAR, CIRCLE

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LINE GRAPHS

• Show the relationship of how the dependent
  variable changes due to changes in the
  independent variable

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LINE GRAPHS

• You can show more than one event on the same
  graph as long as the relationship is the same
• NEEDS A KEY!

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CONSTRUCTING LINE GRAPHS

• x-axis is the Independent Variable
• y-axis is the Dependent Variable

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CONSTRUCTING LINE GRAPHS

• Because the points are RELATED, connect them
• This is how you can tell if a line graph is most
  appropriate. If you are not looking to see CHANGE
  then you dont need a line graph.

Should this be a line graph? NO! There is no
relationship in the change. It should be a bar
graph.
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CONSTRUCTING LINE GRAPHS

• MEASUREMENT all should be in the SAME unit and
  be sure your divisions make sense.
• Use a break if you need it.

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BAR GRAPHS

• Used to compare TOTALS that dont need to show
  change over time
• Show comparisons of quantities counted at a
  particular time.

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BAR GRAPHS

• Multiple bar graphs show two or more sets of data

Like a multiple line graph, you will need a key.
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CIRCLE (PIE) GRAPHS

• Show how some fixed quantity is broken down into
  parts
• The whole circle represents the total
• The slices represent the PERCENTAGES of the total

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CIRCLE (PIE) GRAPHS

• To create a circle graph, start with the total
  and divide each part by the total and multiply by
  360 to find the angle the slice will occupy
• FOR EXAMPLE if the total number of grades
  counted were 100 and the number of As were 31,
  to get the size angle As occupy would be
• 31 100 360 112 (size of the slice for As)

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WHATS WRONG WITH THESE GRAPHS???
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WHATS WRONG WITH THESE GRAPHS???
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WHATS WRONG WITH THESE GRAPHS???
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WHATS WRONG WITH THESE GRAPHS???