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### Grade 7 - Mathematics10.3 Stem-and-Leaf Plots

Stem-and-Leaf Plot
A stem-and-leaf plot is a graph used to organize and display data to compare frequencies. Each leaf on the plot represents the right-hand digit in a data value. Each stem represents the remaining left-hand digits.

2 | 5 = 25
2 | 5 means 25

List the data values in the stem-and-leaf plot.
 0 | 2 5 1 | 3 3 7 8 2 | 0 2 6 3 | 1 7

The data values are 2, 5, 13, 13, 17, 18, 20, 22, 26, 31, 37

Back-to-Back Stem-and-Leaf Plots
Organizing data in Back-to-Back Stem-and-Leaf Plots.

Super Bowl Scores, 1998-2008

 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 Winning 49 27 35 31 34 23 34 20 48 32 24 Losing 26 17 21 24 19 16 7 17 21 29 21

 7 | 0 | 9 7 7 6 | 1 | 9 6 4 1 1 1 | 2 | 0 3 4 7 | 3 | 1 2 4 4 5 | 4 | 8 9

Directions: Answer the following questions. Also write at least 5 examples of your own.

1. List the data values in the steam-and-leaf plot.
 0 | 2 3 3 7 1 | 1 3 7 7 8 2 | 0 0 7 3 | 4 4 5 5
2. List the data values in the steam-and-leaf plot.
 6 | 3 6 8 7 | 3 3 5 7 8 | 0 0 1 1 9 | 0 4 5 9
3. Use the given data to make a back-to-back stem-and-leaf plot.
Political Division of the U.S.Senate
 Congress 89th 90th 91st 92nd 93rd 94th 95th 96th 97th 98th Democrats 68 64 57 54 56 61 61 58 46 46 Republicans 32 36 43 44 42 37 38 41 53 54

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