1. Bar Graphs and Histograms
SWBAT make double bar graphs; interpret double bar graphs; make/use frequency table in preparation for constructing a histogram; make and use a histogram

2. Definitions Double bar graph Histogram
Compares two related sets of data
Histogram
A graph that shows the frequency of equal intervals of data

3. To create a bar graph
Draw a vertical and a horizontal axes on grid paper
Choose an appropriate scale for both sets of data
Label both axes.
Choose colors and create a key
Draw a bar for each value of the data
Write a title for the graph

4. Examples Create a bar graph for the following data
Favorite T-Shirt Colors
Color
Girls
Boys
White 4 7
Red 8
Blue 12
Green 11 6
Yellow

5. Examples What T-shirt colors are favored by more boys than girls?
What T-shirt colors are favored the same by boys and girls?

6. Examples Create a bar graph for the following data Swimsuit Sales
Month
Two-piece
One-piece
April
$2,400
$2,100
May
$3,200
$4,600
June
$5,600
$5,800
July
$5,900
$6,000
August
$5,100
$4,800

7. Examples
When was the total sale of two-piece and one-piece swimsuits the greatest?
When was the total sales the least?

8. Create a Frequency table and a Histogram
Weight of Kennel Dogs (lbs)