A column graph is a graph used to display relative quantities of data in different categories. There is a wide range of topics where this type of graph can be useful. For example the number of tourists visiting different destinations in a month, the number of people with certain eye colours in a class or the popularity of the top ten YouTube channels.
Eye colour in a class |
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Use the following applet to explore creating a column graph.
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Miss Yen recorded her students' favourite pets in the column graph below.
Which type of pet is most popular?
Fish
Bird
Hamster
Cat
Dog
Which pet is least popular?
Bird
Cat
Fish
Dog
Hamster
How many students picked a Fish as their favourite pet?
How many students were surveyed in total?
John had $7$7 blue marbles, $4$4 black marbles, $8$8 yellow marbles, $13$13 white marbles, and $6$6 red marbles. Use this information to complete the column graph.
A picture graph is very similar to a column graph in that is displays the relative size of data in different categories. It differs by using using pictures or symbols to represent data rather than a column. Picture graphs have a key, which explains what each symbol represents.
For example the following picture graph displays the number of glasses of water $6$6 students drank in a week. In this case, each glass represents $6$6 glasses of water, thus, we can see that Conrad consumed $5.5\times6=33$5.5×6=33 glasses of water.
It’s "Back to school" time and a shop recorded the number of pens they sold this week.
Day | Number of pens sold |
---|---|
Monday | |
Tuesday | |
Wednesday | |
Thursday | |
Friday | |
Saturday | |
Sunday |
Where represents $5$5 pens.
How many pens were sold on Wednesday?
How many more pens were sold on Saturday than on Wednesday?
A survey was conducted asking students what transport they used to get to school.
The pictograph shows the responses.
What form of transport is used by exactly $18$18 people?
Train
Bus
Car
Walk
Bike
What is the difference between the amount of students who use the most common form of transport and the amount of students who use the least common form of transport?
How many people participated in the survey who don't catch the train to school?
A poll was taken to find people's favourite cupcake flavours. The votes are shown in the table.
Cupcake Flavours | Number of People |
---|---|
Strawberry | |
Chocolate | |
Vanilla | |
Chocolate Chip | |
Banana |
Where represents $3$3 votes.
How many people voted for Chocolate?
Complete the column graph below so it shows the same data as the table.