1. Graphs

2. Box - and -
Whisker Plot
Circle Graph
Pictograph
Types of Graphs
Bar Graphs
Plots
Line Graphs
Histogram
Single
Stem & Leaf
Single
Line
Double
Double
Scatter

3. Pictograph
Days of the Week
Fireflies
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4. Pictograph All pictographs have a title.
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Pictograph
All pictographs have a title.
Rows and columns shape the pictograph.
Label each row and column.
Use pictures to show the data.
Each picture equals a certain amount of data.
Pictographs need a key.

5. Bar Graph
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6. Bar Graph The purpose of a bar graph is to display and compare data.
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Bar Graph
The purpose of a bar graph is to display and compare data.
Bar graphs use bars to show the data.
A bar graph must include:
- a title
- labeled X and Y axes
- equal intervals are used on the Y axis
- the bars are evenly spaced apart from each other

7. Double Bar Graph
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8. Return to Graph
Double Bar Graph
The purpose of a double bar graph is to compare two or more sets of data.
Uses bars to show the data.
Double bar graphs must include:
- Title
- Labeled X and Y axes
- Equal intervals are used on the Y axis
- Pairs of bars are equally spaced, but the compared bars are not
- Key

9. Histogram
Class Test Scores
Frequency
Test Scores
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10. Histogram Histograms are used to show the frequency of data.
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Histograms are used to show the frequency of data.
Very similar to bar graphs, but use intervals on the X axis.
Bars do touch.
Histograms have a title.
Histograms have two axes which are labeled.

11. Line Graph
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12. Line Graph A line graph is used to illustrate change over time.
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Line Graph
A line graph is used to illustrate change over time.
Line graphs need:
- Title
- Labeled X and Y axes
- Equal Intervals
- Data displayed by points connected into lines

13. Double Line Graph
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14. Return to Graph
Double Line Graph
- Equal Intervals
- Data displayed by points connected into lines
- Key
A double line graph is used to compare two groups of related data over time.
Double line graphs need:
- Title
- Labeled X and Y axes

15. Circle Graph
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16. Return to Graph
Circle Graph
Circle graphs are used to display parts of the data in relation to the entire amount of data.
All circle graphs need a title.
Each part is called a sector and is labeled.
All angles correct (+2/-2 degrees)

17. Line Plot More Info Favorite Colors X X X X X X X X X X X X X
Red Blue Green Yellow Purple
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18. Return to Graph
Line Plot
A line plot shows the spread of all the data on a number line.
Easily identifies the mode.
All line plots include:
- a title
- a numbered horizontal line
- data displayed by use of X’s

19. Stem and Leaf Plot
Student Heights in Centimeters
1 1
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Key: 12
7 = 127 cm

20. Return to Graph
Stem and Leaf Plot
Stem and leaf plots are used as a quick way of seeing how many pieces of data fall in various ranges. The reader can quickly tell:
- the range
- the mode
Stem and leaf plots have a title, a stem, and leaves
A key is used to explain how to read the stem and leaves.

21. Study Time Versus Grades
Scatter Plot
Study Time Versus Grades
100 * * * * 80 * * *
Grade 60 40 20 1 2 3 4 5
Study Time in Hours
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22. Scatter Plot Shows how closely two sets of data are related
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Shows how closely two sets of data are related
The closer the sets are related, the closer the points come to forming a straight line.
Scatter Plots include:
- title
- labeled axes
- equal intervals
- corresponding numbers plotted as ordered pairs

23. Line of Best Fit
A line of best fit (or "trend" line) is a straight line that best represents the data on a scatter plot. Direction of data.
This line may pass through some of the points, none of the points, or all of the points.

24. Box - and - Whisker Plot Hours of Homework 5.25 6.9 6.3 5 7.75 3 4 5 68 9
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25. Box - and - Whisker Plot - Labeled intervals
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Box - and - Whisker Plot
- Labeled intervals
- Box between lower and upper quartiles
- Whiskers from quartiles to extremes
- Median, quartiles and whiskers labeled
Displays large set of data.
Gives general idea of how data clusters.
Graph includes:
- Title

26. Key Words Mean – average or central tend
Median – the number halfway into a set of ordered numbers
Mode – number that occurs the most
Range – difference between the lowest and the highest value
Long-term data collection - the process of gathering and measuring information over an extended time