Reading bar charts
LO: to solve a problem by organising and
interpreting data in bar charts with intervals in ones
and twos.
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?
Vertical
axis (y).
Always
labelled
and
numbered.
A bar chart always has a
title.
The height of the bars show
how many of something was
scored/recorded.
Horizontal axis
(x). Always
labelled.
What does this
bar chart show?
Can you read the answers?
How many
children were
surveyed?
Number of children
Favourite Crisps
Which is the
favourite
flavour?
8
7
6
5
4
3
2
1
0
Which is the
least liked?
What intervals
are used on the y
axis?
Salt and
vinegar
Cheese
and
onion
Prawn
cocktail
Flavours
Ready
salted
Bacon
Worcester
sauce
Barbeque
What intervals
could you use if
twice as many
children were
surveyed?
How can you collect the information needed to construct a bar
chart?
By making a tally chart first!
Flavour
Tally
Salt and vinegar
Cheese and onion
Prawn cocktail
Ready salted
Bacon
Worcester sauce
Barbeque
Insert any other flavours here
Tables 1 and 2:
1. Working in table groups, survey all the children on your
tables using the tally chart template. Find out THEIR favourite
crisps.
2. Then working in pairs, construct a bar chart showing the
favourite crisps in our class.
With support
Tables 3 and 4:
1. Working in threes, shuffle and then deal 30 Pokémon
cards. Sort into card types.
2. Fill in the tally chart and draw a bar chart showing card
types in a typical deal.
Pokémon card tally sheet
Card type
Shiny cards
Energy cards
Character cards
Trainer cards
Tally
Table 5:
1. Working in pairs, deal out 25 Jackie Chan cards and
sort them into different types.
2. Fill in the tally chart and create a bar chart to show
card types in a typical deal.
Jackie Chan Tally Sheet
Card type
Tally
A Tabitha Mellor production