### Resources: Graphing

Graphs show a visual representation of data that has been collected. Samples of the different kinds of graphs are listed below.

Line Plot
A line plot indicates the location of data points along a segment of the number line. The following line plot depicts the number of hits made during a baseball game.

Pictograph
A pictograph uses a repeated picture of a symbol in a bar graph form to represent data. The key tells the value of one symbol.

Bar Graph
A bar graph uses parallel bars, either horizontal or vertical, to represent counts for several categories. One bar is used for each category and the length of the bar represents the count for that category.

Stem and Leaf Plot
A stem and leaf plot lists exact values in a meaningful array. It is especially useful when the data set covers a range of 25 numbers or more. On a real-number line, the data might appear crowded on a line plot, making it difficult to recover the exact numerical values.

Data set = grams of fat content in cereal:
55, 48, 31, 32, 33, 38, 20, 25, 28, 28, 10, 10, 13, 13, 14, 14, 14, 15, 19, 19, 3, 4, 5, 8, 9

Scatter Plot
A scatter plot shows the relationship between paired measurements by plotting each ordered pair on a coordinate grid. The first number of the pair is marked off along the horizontal axis (or the x axis) and the second number is marked off along the vertical axis (or the y axis).

These definitions are from Bereska, C., Bolster, L., & Bolster, C. et.al. (1998). Exploring Statistics in the Elementary Grades, Book 1. White Plains, NY: Dale Seymour Publications.

### Web Resources

Graphing
The ABCs to Excel

http://www.forsyth.k12.ga.us/

The ABC List of Things to Graph
http://www.forsyth.k12.ga.us/

Data Analysis and Probability
http://www.mste.uiuc.edu/stat/stat.html

http://www.cvgs.k12.va.us/digstats/Dmain.html

CensusScope
http://www.censusscope.org

index.html

zillions.htm

Graph-it!
http://www.coolmath.com/graphit/index.html

Probability and Statistics
http://score.kings.k12.ca.us/
other.prob.and.stat.htm

Rolling Thunder Real-Time Data Lessons
http://www.bhs.bboed.org/public/thunder/
rollingthunder/science.html

Activities/Games
Create a Graph
http://nces.ed.gov/nceskids/graphing

Bugs in the System (primary grades)
http://pbskids.org/cyberchase/games/

bargraphs/bargraphs.html

Bar Graphs
Bar Graph Sorter (primary)

http://www.shodor.org/interactivate/
activities/bargraph2

Using Data Tools: Bar Graph
http://www.mdk12.org/data/tools/
diygraphbar2.asp

Circle Graphs
Circle Graph
http://www.shodor.org/interactivate/
activities/piecharttool

Create a Graph: Pie Chart
http://nces.ed.gov/nceskids/
graphing/pie.asp

Using Data Tools — Circle Graph
http://www.mdk12.org/data/tools/
diygraphpie.asp

Scatter Plots

Virtual Manipulative — Scatter Plot
http://matti.usu.edu/nlvm/nav/
frames_asid_144_g_3_t_5.html

Simple Plot
http://www.shodor.org/interactivate/
activities/simpleplot

Line of Best Fit
http://www.mste.uiuc.edu/users/carvell/
PlotPoints/default.html