1. Graphing Review Part 2
Types of Graphs

2. How do I know what type of graph to use or what kind of data is being displayed?
Each type of graph is specifically used for a type of data.
While some data can be displayed multiple ways, there is a “best” type of graph for each.

3. Line Graph Line graphs are used for:  Continuous data
 Showing trends
 Data that is changing (usually
measured against time)
**Not a single time, but a continuously
measured time frame.

4. Example Line Graph
Days

5. Bar Graph and Histograms
Bar graphs and Histograms are useful for categories of data
 Used to show data that are not continuous.
 Allows us to compare data of like amounts or
frequency or categories
 Allow us to make generalizations about the data
 Help us see differences in data

6. Example Bar Graph

7. Example Histogram S
tudent s
Flavors

8. Pie Chart / Circle Graph
Good for showing data that are part of a whole
 usually shows percentages (%)
To find % of a whole
a. Find total number of items
b. Find number of each item
c. Percent = number of each item divided by
total number of items, multiplied by 100
% = PART x 100
WHOLE

9. Example Pie Chart / Circle Graph

10. Pictograph
A pictograph is a bar graph that uses pictures to represent varying amounts of an item.
For example, a t-shirt may represent 500 shirts sold.

11. Example Pictograph