# data[].attributes.body
Pie chart

# data[].attributes.attachment_link.readable_text
Pie Chart: a special chart that uses "pie slices" to show relative sizes of data.

Imagine you survey your friends to find the kind of movie they like best:

You can show the data by this Pie Chart:

It is a really good way to show relative sizes: it is easy to see which movie types are most liked, and which are least liked, at a glance.

You can create graphs like that using our Data Graphs (Bar, Line and Pie) page.

Or you can make them yourself ...

How to Make Them Yourself

First, put your data into a table (like above), then add up all the values to get a total:

Next, divide each value by the total and multiply by 100 to get a percent:

Now to figure out how many degrees for each "pie slice" (correctly called a sector).

A Full Circle has 360 degrees, so we do this calculation:

Now you are ready to start drawing!

Draw a circle.

Then use your protractor to measure the degrees of each sector.

Here I show the first sector ...

Finish up by coloring each sector and giving it a label like " Comedy: 4 (20%)", etc.

(And dont forget a title!)

Another Example

You can use pie charts to show the relative sizes of many things, such as:

what type of car people have,

how many customers a shop has on different days and so on.

how popular are different breeds of dogs

Example: Student Grades

Here is how many students got each grade in the recent test:

And here is the pie chart:

# data[].attributes.attachment_link.description
A Pie Chart is a special chart that uses pie slices to show relative sizes of data.

# data[].attributes.body
Bar graphs or Column graphs

# data[].attributes.attachment_link.readable_text
A Bar Graph (also called Bar Chart) is a graphical display of data using bars of different heights.

Imagine you just did a survey of your friends to find which kind of movie they liked best:

We can show that on a bar graph like this:

It is a really good way to show relative sizes: we can see which types of movie are most liked, and which are least liked, at a glance.

We can use bar graphs to show the relative sizes of many things, such as what type of car people have, how many customers a shop has on different days and so on.

Example: Nicest Fruit

A survey of 145 people asked them "Which is the nicest fruit?":

And here is the bar graph:

That group of people think Blueberries are the nicest.

Bar Graphs can also be Horizontal, like this:

Example: Student Grades

In a recent test, this many students got these grades:

And here is the bar graph:

You can create graphs like that using our Data Graphs (Bar, Line, Dot, Pie, Histogram) page.

Histograms vs Bar Graphs

Bar Graphs are good when your data is in categories (such as "Comedy", "Drama", etc).

But when you have continuous data(such as a person's height) then use a Histogram.

It is best to leave gaps between the bars of a Bar Graph, so it doesn't look like a Histogram.

# data[].attributes.attachment_link.description
A Bar Graph (also called Bar Chart) is a graphical display of data using bars of different heights. Imagine you just did a survey of your friends to find which kind of movie they liked best: We can show that on a bar graph like this: It is a really good way to show relative sizes: we can see which types of movie are most liked, and which are least liked, at a glance.

# data[].attributes.body
Pictographs

# data[].attributes.attachment_link.readable_text
A Pictograph is a way of showing data using images.

Each image stands for a certain number of things.

Example: Apples Sold

Here is a pictograph of how many apples were sold at the local shop over 4 months:

Note that each picture of an apple means 10 apples (and the half-apple picture means 5 apples).

So the pictograph is showing:

In January 10 apples were sold

In February 40 apples were sold

In March 25 apples were sold

In April 20 apples were sold

It is a fun and interesting way to show data.

But it is not very accurate: in the example above we can't show just 1 apple sold, or 2 apples sold etc.

Pictographs can also be vertical, like this:

Example: Games Played

Four friends play a lot of tennis. Here is how many games they played this year:

Each tennis ball means 20 games played. A tennis ball can be cut to show part of 20.

So the pictograph is showing:

Can you see that Alex played 55 games?

Why don't you try to make your own pictographs? Here are a few ideas:

How much money you have (week by week)

How much exercise you get (each day)

How many hours you play games every week

How much water you drink

How far your friends travel every day

How many goals your team makes

Have fun making pictures for each!

# data[].attributes.attachment_link.description
A Pictograph is a way of showing data using images. Each image stands for a certain number of things. Here is a pictograph of how many apples were sold at the local shop over 4 months: Note that each picture of an apple means 10 apples (and the half-apple picture means 5 apples).

# data[].attributes.body
LIne graphs

# data[].attributes.attachment_link.description
Learn about bar, pie, and line graphs with this adventure as Tim and Moby coordinate their x-axes, and plot a course to the Caribbean!

# data[].attributes.attachment_link.readable_text
Loading...

# data[].attributes.body
https://www.brainpop.com/math/dataanalysis/

# data[].attributes.attachment_link.title
eSpark Learning: Represent and Interpret Data Framing Video (Fa13, 1.MD Quest 5)