Reading bar charts

1
Reading bar charts LO to solve a problem by
organising and interpreting data in bar charts
with intervals in ones and twos.
2
Look at the way a bar chart is constructed. Can
you name its different parts?
What goes here?
What is this called?
What is this?
What do we call this?
3
A bar chart always has a title.
Vertical axis (y). Always labelled and numbered.
The height of the bars show how many of something
was scored/recorded.
Horizontal axis (x). Always labelled.
4
What does this bar chart show? How many children
were surveyed? Which is the favourite
flavour? Which is the least liked? What intervals
are used on the y axis? What intervals could you
use if twice as many children were surveyed?
Can you read the answers?
Favourite Crisps
Number of children
0
Salt and vinegar
Cheese and onion
Prawn cocktail
Ready salted
Bacon
Worcester sauce
Barbeque
Flavours
5
How can you collect the information needed to
construct a bar chart?
By making a tally chart first!
6
Flavour Tally
Salt and vinegar
Cheese and onion
Prawn cocktail
Ready salted
Bacon
Worcester sauce
Barbeque

Insert any other flavours here
7

• Tables 1 and 2
• Working in table groups, survey all the children
  on your tables using the tally chart template.
  Find out THEIR favourite crisps.
• Then working in pairs, construct a bar chart
  showing the favourite crisps in our class.

With support
8

• Tables 3 and 4
• Working in threes, shuffle and then deal 30
  Pokémon cards. Sort into card types.
• Fill in the tally chart and draw a bar chart
  showing card types in a typical deal.

9
Pokémon card tally sheet
Card type Tally
Shiny cards
Energy cards
Character cards
Trainer cards
10

• Table 5
• Working in pairs, deal out 25 Jackie Chan cards
  and sort them into different types.
• Fill in the tally chart and create a bar chart to
  show card types in a typical deal.

11
Jackie Chan Tally Sheet
Card type Tally







12
A Tabitha Mellor production