# Comparing Data in a Bar Graph

Content Comparing Data in a Bar Graph
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## Basics on the topicComparing Data in a Bar Graph

Imagine this: you have collected data about the weather to try to predict what the weather will be like the next day so you can plan a day at the beach. You have recorded the total number of sunny, rainy, and windy days. Let’s see how you can compare this data with the help of a bar graph!

## Bar Graphs – Definition

A bar graph is like a picture that is made up of bars of different lengths. Each bar represents a different category. The length of each bar can tell us how often something happens or show us the number of items we have in each group.

## Comparing Data in a Bar Graph

Let’s see how our data compares! We have recorded three different types of weather: sunny, windy and rainy. This chart shows the individual amount of days with each weather type:

Type of weather # of days
sunny 8
windy 5
rainy 7

All we have to do now is to set up our bar graph.

We set up a bar graph like this. We have our data categories on one side and a number scale alongside the other. We put a label by the numbers to tell us what we are counting. To record the data, count how many times a category appears and draw a bar that reaches to the number.

Now that the data is in the shape of bars, we can see the information easily. We see the sunny, windy and rainy days neatly organized and since the bars are next to one another, we can now compare the data visually. We can answer questions like which weather had the most or least amount of days. We can also use the bar graphs to help add or subtract the data.

## Comparing Data in a Bar Graph – Further Practice

Why do you use bar graphs to represent data? Bar graphs help you to organize your data neatly and thereby enable you to visualize your data so that other people may find it easier to understand your data too. Following the video are more interactive exercises and worksheets to continue practicing looking at information on bar graphs and seeing why bar graphs are useful for comparing data.

## Comparing Data in a Bar Graph exercise

Would you like to apply the knowledge you’ve learned? You can review and practice it with the tasks for the video Comparing Data in a Bar Graph .
• ### Can you highlight the bar graph?

Hints

Which bar is the tallest? This represents the weather that occurred the most.

Which bar is the shortest? This represents the weather that occurred the least.

Solution

Snowy was the type of weather that occurred the least. We can see from the bar graph that it only snowed on 3 days.

Cloudy was the type of weather that occurred the most. We can see from the bar graph that it was cloudy on 6 days.

• ### What has the weather been like?

Hints

Line up the top of each bar with the numbers on the side.

The taller the bar, the more days that type of weather occurred.

Solution

If we line the top of each bar up with the numbers on the side we find that there were:

• 4 sunny days
• 5 rainy days
• 3 snowy days
• 6 cloudy days
There was 1 more rainy day than sunny day as 5 is one more than 4.

• ### Can you sort the data?

Hints

Which bar is the tallest? This is the most popular flavor and will go first.

If there is no bar that means that 0 of Nari and Gus's friends chose that flavor making it the least popular.

Solution
• Vanilla was the most popular flavor. 5 friends chose this flavor.
• Strawberry was the next most popular. 3 friends chose this flavor.
• Next was chocolate. 2 friends chose this flavor.
• The least popular flavor was mint choc chip. 0 friends chose this flavor.
• ### Which colors are the friends' favorite?

Hints

Use the data that you have to fill in the gaps in the table. Which number does each bar line up to?

When thinking about the most popular color, use all of the data you have.

• Which bar is the tallest?
• Which number is the biggest?

When thinking about the least popular color, use all of the data you have.

• Which bar is the shortest?
• Which number is the smallest?

Solution

Here is the completed table.

• The most popular color was green as 8 friends chose this color which is more than any other.
• The least popular color was yellow as 1 friend chose this color which is fewer than any other.
• ### Which was the most popular fruit?

Hints

Most popular means the option that was chosen the most times.

Which bar is the tallest? This is the most popular choice.

Solution

Apple was the most popular choice.

7 friends chose apple as their favorite fruit compared to 4 for banana, 5 for orange and 2 for pear. This means that more friends chose apple making it the most popular choice.

• ### Which charts represent the same data?

Hints

Figure out what each chart is representing. How many people have each eye color?

Three images represent the same data set.

The charts that are representing the same data all have the same number in each category.

Solution

This is the data set that was being represented in three images:

• the tally chart
• the bar graph
• the pictogram
All three of these charts showed that 18 children had been surveyed for eye color and that: