
Graphing
› Pictographs
› Bar Graphs
› Double Bar Graphs
*No line graphs (reserved for our Stock Assignment)
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
Mean and Mode
Trends and Interpreting Graphs

You need to know the Elements of a
good graph …
What is wrong with this bar graph?
 Correct the mistakes and create a good
graph using all the proper elements.


You need to know how to use data to
create a bar graph and a double bar
graph.

Use the data below to create a proper
bar graph.
Year
Bonanza Fundraising
2007
$687
2008
$777
2009
$841
2010
$654
2011
$741
2012
$710
2013
$781

Look at the data below. Use it to create
double bar graph.
Doug Gilmour’s Career as a Toronto Maple Leaf
Regular Season
Playoffs
Season
Team
Games
Goals
Assist
Points
Games
Goals
Assist
Points
1991-92
Toronto Maple Leafs
40
15
34
49
0
0
0
0
1992-93
Toronto Maple Leafs
83
32
95
127
21
10
25
35
1993-94
Toronto Maple Leafs
83
27
84
111
18
6
22
28
1994-95
Toronto Maple Leafs
44
10
23
33
7
0
6
6
1995-96
Toronto Maple Leafs
81
32
40
72
6
1
7
8
1996-97
Toronto Maple Leafs
61
15
45
60
0
0
0
0

You need to know how to make a
pictograph
Use the data below to create a
pictograph.
 Explain your scale.

Year
Grad Trip Cost
2007
$190
2008
$220
2009
$200
2010
$240
2011
$225
2012
$220
2013
$220
You need to know how to calculate the.
 The Mean is the average of a group of
numbers.
2, 6, 8, 4, 4, 0
 To calculate, add up the numbers in the
group:
2+6+8+4+4+0= 24
and
divide by the number of numbers in the
group
24 divided by 6 = 4.
The mean is 4


What is the mean of each data group?
Explain how you know.
2, 3, 4
2. 1, 2, 5, 4, 3
3. 5, 5, 1, 1, 0, 6
4. 10, 10, 15, 25, 40
1.

The mode is the number that occurs the
most often in a group of data.
4, 5, 2, 5, 6, 5, 1, 1
5 occurs more than any other number. 5 is the mode.

There can be only one mode. If no
number appears the ‘most’ than there is
no mode.
1, 4, 5, 2, 5, 6, 5, 1, 1
5 and 1 both occur the same number of times. There
is no mode.
You need to know how to read and
interpret graphs
 Trends:

Increasing
Decreasing
Staying constant
(about the same)
Explain the trends you see in this graph.
Why do you think these trends are
occurring?

Reminder: You need
› A ruler
› Pencil
› Eraser
› Coloured Pencils
To complete this test to expectation.