Prepare a bar graph based upon scientific data

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AIM What is a bar graph?
OBJECTIVES
Prepare a bar graph based upon scientific
data
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• DEFINITION
• a BAR GRAPH is a diagram in which separate but
  related items are represented by rectangular
  shapes called bars
• the horizontal axis usually represents the
  manipulated variable
• the vertical axis usually represents the
  responding variable

AIM What is a bar graph?
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• EXAMPLE
• Absences today
• 6th grade 7
• 7th grade 12
• 8th grade 4
• Put this in a bar graph

AIM What is a bar graph?
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Step One Draw your axis
AIM What is a bar graph?
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Step Two label your axis
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AIM What is a bar graph?
10
of Absences
5
6th 7th 8th
Grade Level
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Step Three plot your data
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AIM What is a bar graph?
10
of Absences
5
6th 7th 8th
Grade Level
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Step Four Fill in your bars
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AIM What is a bar graph?
10
of Absences
5
6th 7th 8th
Grade Level
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Step Five What is Missing? TITLE YOUR
GRAPH!
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AIM What is a bar graph?
10
of Absences
5
6th 7th 8th
Grade Level
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Step Five Possible Title -- Absences in Each
Grade Level
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AIM What is a bar graph?
10
of Absences
5
6th 7th 8th
Grade Level
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Step Five Alternative Title x vs. y Grade
Level vs. Absences
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AIM What is a bar graph?
10
of Absences
5
6th 7th 8th
Grade Level
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Example What is the difference between boys and
girls on Team A in each Science Class? 2nd
period 10B 8G 5th 8B 10G 6th 7G 11B 7th
12G 8B
AIM What is a Bar Graph?
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What should we do first? We should probably put
our raw data into a better and simpler data
table. 2nd period 10B 8G 5th 8B 10G 6th
7G 11B 7th 12G 8B any suggestions?
AIM What is a Bar Graph?
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AIM What is a Bar Graph?
Boys and Girls in each Science Class Period Boy
s Girls 2 10 8 5 8 10 6 11 7 7
8 12
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Step One Draw your axis
AIM What is a bar graph?
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Step Two label your axis
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AIM What is a bar graph?
of Boys/Girls
10
5
2 5 6 7
Science Classes
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Step Three and Step Four Plot your data and
fill in your bars
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AIM What is a bar graph?
of Boys/Girls
10
5
2 5 6 7
Science Classes
Boys Girls
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Step Five ???? TITLE Boys and Girls in Each
Science Class
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AIM What is a bar graph?
of Boys/Girls
10
5
2 5 6 7
Science Classes
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Step Five ???? x vs. y Science Class vs.
the Number of Boys and Girls
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AIM What is a bar graph?
of Boys/Girls
10
5
2 5 6 7
Science Classes
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AIM What is a bar graph?
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• Tips for Bar Graphs?
• The manipulated variable always goes on the x
  axis. (What does that mean?)
• Title and Label all axis. Include the units!
• Determine the correct scale to be used on the
  graph.
• Make sure your vertical axis uses a scale which
  is consistent and does not change

AIM What is a bar graph?
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• Tips for Bar Graphs?
• The width of all bars should be the same
• You should leave a skipped space between each
  separate bar group.
• That skipped space should be the same distance
  for each category

AIM What is a bar graph?
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• Tips for Bar Graphs?

TITLE YOUR GRAPH
AIM What is a bar graph?
Don't forget!
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Table of Plant Days vs. Plant Height
Mark a Bar Graph
F-Plant 1 NF-Plant 2
(inches) (inches)

2 2 4 4 8 7 10 8 14 9
Day of Growth 2 5 10 15 20
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14
12
10
Height of Plant
8
6
4
2
2 5 10 15 20
Days of Growth
F-Plant 1 NF- Plant 2
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What is wrong with this Graph (2 things) ?

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12
10
Height of Plant
8
6
4
2
2 5 10 15 20
Days of Growth
F-Plant 1 NF- Plant 2
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Days of Growth vs. Plant Height

14
12
10
Height of Plant
8
6
4
2
2 5 10 15 20
inches
Days of Growth
F-Plant 1 NF- Plant 2
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AIM What is a Bar Graph?
Class ACTIVITY Creating Bar Graphs page 63
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Knap-Sack Brand
Brand Number of Boys
NIKE 20
FUBU 40
Polo 30
TARGET 10
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Knap-sack brand vs Students
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A Team Population
Year Number
2004 110
2003 105
2002 85
2001 101
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Years vs. Number of Students
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Sports Participation by Sex
Sport Number of Boys Number of Girls
Soccer 25 20
Baseball 20 30
Basketball 15 15
Tennis 8 16
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Sports Participation by Sex
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NMS Fundrasing
Activity Receipts Expense
Car wash 100 60
Breakfast 150 50
Bake Sale 125 25
Raffle 200 100
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Event vs. Dollar Amount
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NMS Absences
Day 6th grade 7th 8th
Tuesday 5 10 6
Wednesday 7 10 6
Thursday 6 6 6

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Day vs Absences
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AIM What is a bar graph?

• Homework
• INTERNET QUESTIONS