Bank balances

Bank balances

Pencil and paper
Overview
Using this Resource
Connecting to the Curriculum
Marking Student Responses
Working with Students
Further Resources
This task is about reading information from a bar graph.
Money in Isoa's Bank Account Each Month

The graph above shows the amount of money in Isoa's bank account each month last year. Use the graph to answer the questions below.

a) i)
 
ii)
 
In what month did Isoa have the most money in her bank account? __________
 
How much money did she have in this month?   $__________
 
b) By how much had the amount in Isoa's bank account changed between May and June?
 
$__________
 
c) Describe the changes in Isoa's bank account from January to June.
 
______________________________________________________________________
 
______________________________________________________________________
 
______________________________________________________________________
 
d) i)
 
 
 
ii)
In what month, between July and December, did something unusual happen?
 
__________
 
Explain what was unusual about this month.
 
__________________________________________________________________
Task administration: 
This task is completed with pencil and paper only.
Level:
4
Description of task: 
Students interpret a bar graph of account balances and respond to questions about the data.
Curriculum Links: 
This resource can be used to help to identify students' ability to interpret a time series situation.
Key competencies
This resource involves describing a trend in a time series. This relates to the Key Competency: Using language, symbols and text.
Learning Progression Frameworks
This resource can provide evidence of learning associated with within the Mathematics Learning Progressions Frameworks.
Read more about the Learning Progressions Frameworks.
Answers/responses: 
  Y8 (11/2001)
a) i)
ii)
April
1150 [Accept range 1125 to 1175].
difficult
b)   200 difficult
c)  
  • Comments on increase from Jan to Apr, decrease from Apr to Jun.
  • Comments on the rate of increase between Jan and Apr.
  • Comments on rate of decrease between April and Jun.difficult
very difficult
very difficult
d) i)
ii)
September
Her account went into overdraft (-$300) or similar statement.
easy
difficult
Diagnostic and formative information: 
  Common error Likely reason
a) ii)
b)
11.00, 11.50
20, 2
Does not read the scale ($00s).