Graphs

1
Graphs
Class A
Class B
2
Box - and - Whisker Plot
Circle Graph
Pictograph
Types of Graphs
Bar Graphs
Plots
Line Graphs
Histogram
Stem Leaf
Single
Single
Line
Double
Double
Scatter
3
Pictograph
Days of the Week
Fireflies
4
Pictograph

• Pictographs use pictures to show data
• Each picture equals a certain amount of the data
• Pictographs have a title

• Each picture equals a certain amount of data.
• Pictographs need a key.

5
Bar Graph
6
Bar Graph

• Bar Graphs display and compare data using bars
• A bar graph must include
• - a title
• - labeled X and Y axes

• The bars do not touch
• - equal intervals are used on the Y axis
• - the bars are evenly spaced apart from each
  other

7
Double Bar Graph
8
Double Bar Graph

• Double Bar Graphs compare two or more sets of
  data using bars
• 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
Line Graph
10
Line Graph

• A Line Graph shows change over time
• Line graphs need
• - Title
• - Labeled X and Y axes
• - Equal Intervals

• - Data displayed by points connected into
  lines

11
Double Line Graph
12
Double Line Graph

• - Equal Intervals
• - Data displayed by points connected into lines
• - Key

• Double Line Graphs compare two groups of related
  data over time.
• Double line graphs need
• - Title
• - Labeled X and Y axes

13
Circle Graph
14
Circle Graph

• Circle graphs 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 to
  represent a category

15
Histogram
Class Test Scores
Frequency
Test Scores
16
Histogram

• Histograms 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.

17
Stem and Leaf Plot
Student Heights in Centimeters
7 8 8 9 1 2 4 4 4 6 6 0 0 2 3 3 4 7 1 1
Key 12
7 127 cm
18
Stem and Leaf Plot

• Stem and Leaf Plots are a quick way of seeing how
  many pieces of data fall in various ranges
• Plots show the range and the mode of data
• Stem and leaf plots have a title, a stem, and
  leaves
• A key explains how to read the stem and leaves.

19
Line Plot
Favorite Colors X X X X X X X X X X X X X X
X X X X X Red Blue Green Yellow Purple
20
Line Plot

• A line plot shows frequency of the number in a
  data set using Xs
• Easily identifies the mode
• All line plots include
• - a title
• - a numbered horizontal line

21
Scatter Plot
Study Time Versus Grades
100





80


60
Grade
40
20
0
0
1
2
3
4
5
Study Time in Hours
22
Scatter Plot

• 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
Box - and - Whisker Plot
Hours of Homework
5.25
6.9
6.3
7.75
5
4
9
5
8
7
6
3
24
Box - and - Whisker Plot

• A Box-and-Whisker Plot displays a large set of
  data
• Gives general idea of how data clusters
• Graph includes
• - Title

• - Labeled intervals
• - Box between lower and upper quartiles
• - Whiskers from quartiles to extremes