How_To_Be_Good_At_Math

Drawing bar charts

Now let’s start drawing the

bars for our instruments.

The first frequency in the table is

7, which represents the number

of children who play guitar.

Then we do the same for

all the other instruments.

We find 7 on the vertical

scale of the y axis. Next,

we draw a short horizontal line

level with 7. It must be exactly

above the marks we made for

the guitar bar on the x axis.

We’ll make the line 2 small

squares long, the same as the

distance between the markers.

Then we do the same for

all the other instruments.

To complete the guitar bar,

we draw two vertical lines

up from its markers on the x

axis. The lines join up with the

ends of the horizontal line we

drew earlier.

Finally, let’s colour in the

bars. The bars can be all

the same colour if you want.

But if we make the bars

different colours, it may make

the chart easier to understand.

Use a ruler to make sure

your lines are straight Give your bar

chart a title

The two vertical lines meet the

horizontal line to form a bar

Colour in

the bars

Musical instruments we play

NUMBER OF CHILDREN

0

1

2

3

4

5

6

7

8

Guitar

INSTRUMENT

Violin Trumpet Flute Piano

Line must be directly above

the bar it represents

Length must be the

same as the distance

between the markers

NUMBER OF CHILDREN

0

1

2

3

4

5

6

7

8

Guitar

INSTRUMENT

Violin Trumpet Flute Piano

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