Bar chart

Bar chart

LO: To construct and interpret ​Bar Chart

​When to use a bar graph?

• A bar graph is a graph that uses ​bars of different lengths to compare data.

• The graph compares ​different categories

• The graph shows how many are in each category.

​Rules for a bar chart

​

1. Title of chart

2. Labels on axes

3. Frequency on vertical axes

​4. Right scales

5. Space between bars

​

​

Multiple Select

What is wrong with this bar graph?

• It has no title and no label on the vertical axis

• There should be a space between the bars

• The bars should all be the same colour

• The scale on the vertical axis is wrong

​Data will be given by category and frequency

• ​Categories: Flavours of ice cream, Types of flowers, Favourite pets, colours of cars...

• ​

• Frequency: ​Number sold, Number of pupils, Number of pets...

Multiple Choice

Which graph shows this data?

​Reading Bar Graph

• Look for the category​ and read off the numbers on the vertical axis which is at the same height as that bar.

Multiple Choice

How many students take the bus to school?

• 35

• 10

• 20

• 15

Multiple Choice

Which cookie is the least favourite?

• Ginger Snap

• Oatmeal Cookie

• Sugar Cookie

Multiple Choice

How many chickens does Nate have on his farm?

• 12

• 11

• 9

• 10

Multiple Choice

How many students' favourite colour is blue?

• 13

• 11

• 14

• 10

Multiple Choice

How many students' favourite colour is green?

• 10

• 11

• 12

• 13