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 do we call this?

What is this?

Horizontal axis (x). Always labelled.

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.

Can you read the answers?

Flavours

Num

ber

of c

hild

ren

Favourite Crisps

Salt and vinegar

Cheese and onion

Prawn cocktail

Ready salted

Bacon Worcester sauce

Barbeque

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?

0

1

234567

8

How can you collect the information needed to construct a bar chart?

By making a tally chart first!

Salt and vinegar

Cheese and onion

Prawn cocktail

Ready salted

Bacon

Worcester sauce

Barbeque

Flavour Tally

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.

Shiny cards

Energy cards

Character cards

Trainer cards

Pokémon card tally sheet

Card type 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 SheetCard type Tally

A Tabitha Mellor production