Prior Topic: Tables and Graphs
Data can be presented in different formats. Both tables contain the same information:
The following tables show the number of books that John reads
each month.
Month
|
Jan
|
Feb
|
Mar
|
Apr
|
May
|
Jun
|
Number of Books
|
4
|
3
|
7
|
6
|
2
|
10
|
Months
|
Number
|
January
|
4
|
February
|
3
|
March
|
7
|
April
|
6
|
May
|
2
|
June
|
10
|
Data can also be represented using different type of graphs.
Table Bar Graph
Doing Graph Questions
Example
The line graph shows the size of the T-shirts ordered by a
class.
(Q1) How many students order size S?
(Q2) How many students need T-shirt bigger than Size M?
(Q3) How many students are there in the class?
(Q4) Which size/sizes receive at least 6 orders?
(Q4) Which size/sizes receive at least 6 orders?
Method (Before answering the
question)
Compute the axis scale
Compute the axis scale
Step1: higher scale – lower value = 8-4 = 4units
Step2: Count number of minor scale(Block) = 2
Step2: Count number of minor scale(Block) = 2
(Q1) How many students order size S?
Method:
Step1: Circle keyword (size S, how many)
Step2: Draw line up and Across to Y to get
value
Step3: Solve: 1 block above 4 Ã 4+2 = 6
(Q2) How many students need T-shirt bigger than Size M?
Step1:
Circle Keywords (bigger than M -> L and XL, How many)
Step2:
Draw line up and across Y to get value
Step3:
Solve : L is between 6 and 8 = 7, XL is between 4 and 6 = 5
T-shirts bigger than M = 7 + 5 = 12
(Q3) How many students are there in the class?
(Request student to show the working)
XS = 4, S=6,
M=14, L = 7, XL=5
Total = 4+6+14+7+5 =
36 students.
(Q4) Which size/sizes receive at least 6 orders?
Method:
Step1: Circle Keywords (at least, 6 orders, size)
Step2: Map given value: at least 6 -> 6 and more
than 6 quantity),
Draw line at 6 on Y, and circle Value and Line Down
Step3: Solve: 3 values 6, 7 and 14 -> S, M and
L
Size S, M and L
receive at least 6 orders.
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