How_To_Be_Good_At_Math

284 STATISTICS •^ BLOCK GRAPHS

This tally chart shows the results

of a survey that asked children

which fruit they liked best. Let’s use

the data to make a block graph.

Each tally mark shows that

one child chose that fruit.

We draw a square block

on our graph for every

tally mark on the chart. All the

blocks must be the same size.

We stack the blocks on

top of each other in

columns. Leave gaps between

the columns. The number of

blocks in a column shows how

many times that fruit was

chosen (the frequency).

Block graphs

A block graph is a kind of graph in which one block, usually

a square, is used to represent one member of a group or

set of data. The blocks are stacked in columns.

Each block tells you that

one child chose that fruit

Give your block

graph a title

Five children

preferred

bananas

Grapes were the

most popular fruit

Leave gaps

between

columns

Most popular fruit

Orange

TYPE OF FRUIT

Apple Grapes Watermelon Banana

Orange

Apple

Grapes

Watermelon

Banana

Six children

preferred apples

Tally marks record

frequency of the data

Which fruit do you prefer?

Block graphs show

data as stacks of

square blocks.

284_285_Block_bar_charts.indd 284 29/02/2016 18:06