Prepare a bar graph based upon Prepare a bar graph based upon scientific datascientific data

AIM: What is a bar graph?

• 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

: Wh

at i s a bar grap

h?

• EXAMPLE:

Absences today

6th grade 7

7th grade 12

8th grade 4

Put this in a bar graph

AIM

: Wh

at i s a bar grap

h?

AIM

: Wh

at i s a bar grap

h?

Step One: Draw your axis:

AIM

: Wh

at i s a bar grap

h?

Step Two: label your axis:

Grade Level

6th 7th 8th

# of Absences 5

10

15

AIM

: Wh

at i s a bar grap

h?

Step Three: plot your data:

Grade Level

6th 7th 8th

# of Absences 5

10

15

AIM

: Wh

at i s a bar grap

h?

Step Four: Fill in your bars:

Grade Level

6th 7th 8th

# of Absences 5

10

15

AIM

: Wh

at i s a bar grap

h?

Step Five: What is Missing?

TITLE YOUR GRAPH!

Grade Level

6th 7th 8th

# of Absences 5

10

15

AIM

: Wh

at i s a bar grap

h?

Step Five: Possible Title --

Absences in Each Grade Level

Grade Level

6th 7th 8th

# of Absences 5

10

15

AIM

: Wh

at i s a bar grap

h?

Step Five: Alternative Title

{x vs. y} Grade Level vs. Absences

Grade Level

6th 7th 8th

# of Absences 5

10

15

Example:

What is the difference between boys and girls on Team A in each Science Class?

2nd period: 10B 8G5th 8B 10G6th 7G 11B7th 12G 8B

AIM

: Wh

at is a Bar G

raph

?

What should we do first?

We should probably put our “raw data” into a better and simpler data table.

2nd period: 10B 8G5th 8B 10G6th 7G 11B7th 12G 8B

any suggestions?

AIM

: Wh

at is a Bar G

raph

?

Boys and Girls in each Science Class

Period Boys Girls2 10 85 8 106 11 77 8 12

AIM: What is a Bar Graph?

AIM

: Wh

at i s a bar grap

h?

Step One: Draw your axis:

AIM

: Wh

at i s a bar grap

h?

Step Two: label your axis:

Science Classes

2 5 6 7

# of Boys/G

irls

5

10

15

AIM

: Wh

at i s a bar grap

h?

Step Three and Step Four:

Plot your data and fill in your bars:

Science Classes:

2 5 6 7

# of Boys/G

irls

5

10

15

Boys Girls

AIM

: Wh

at i s a bar grap

h?

Step Five: ????

TITLE: Boys and Girls in Each Science Class

Science Classes

2 5 6 7

# of Boys/G

irls

5

10

15

AIM

: Wh

at i s a bar grap

h?

Step Five: ???? {x vs. y}

Science Class vs. the Number of Boys and Girls

Science Classes

2 5 6 7

# of Boys/G

irls

5

10

15

0

2

4

6

8

10

12

Number of Students

2 5 6 7

Science Class Period:

Boys and Girls in Each Science Class

BoysGirls

AIM

: Wh

at i s a bar grap

h?

• 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

: Wh

at i s a bar grap

h?

• 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

: Wh

at i s a bar grap

h?

• Tips for Bar Graphs?

AIM

: Wh

at i s a bar grap

h?

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

Table of Plant Days vs. Plant Height:

:

Days of Growth 2 5 10 15 20

Height of P

lant

2

6

F-Plant 1 NF- Plant 2

4

8

10

14

12

:

Days of Growth 2 5 10 15 20

Height of P

lant

2

6

F-Plant 1 NF- Plant 2

4

8

10

14

12

What is wrong with this Graph (2 things) ?

:

Days of Growth 2 5 10 15 20

Height of P

lant

2

6

F-Plant 1 NF- Plant 2

4

8

10

14

12

Days of Growth vs. Plant Height

inches

Class ACTIVITY:

Creating Bar Graphs page 63

AIM: What is a Bar Graph?

Knap-Sack Brand

Brand Number of Boys

NIKE 20

FUBU 40

Polo 30

TARGET 10

Knap-sack brand vs Students

0

5

10

15

20

25

30

35

40

Nike Fubu Polo Target

Number of Students

A Team Population

Year Number

2004 110

2003 105

2002 85

2001 101

Years vs. Number of Students

0

20

40

60

80

100

120

2004 2003 2002 2001

Student

Sports Participation by Sex

Sport Number of Boys Number of Girls

Soccer 25 20

Baseball 20 30

Basketball 15 15

Tennis 8 16

Sports Participation by Sex

0

5

10

15

20

25

30

35

soccer baseball basketball tennis

boysgirls

NMS Fundrasing

Activity Receipts Expense

Car wash 100 60

Breakfast 150 50

Bake Sale 125 25

Raffle 200 100

Event vs. Dollar Amount

0

50

100

150

200

250

Car Wash Pancake Bake Sale Raffle

RecieptsExpenses

NMS Absences

Day 6th grade 7th 8th

Tuesday 5 10 6

Wednesday 7 10 6

Thursday 6 6 6

Day vs Absences

0

1

2

3

4

5

6

7

8

9

10

Tueday Wednesday Thursday

6th7th8th

Homework:

INTERNET QUESTIONS

AIM: What is a bar graph?