# Interpreting Data

Data can be visually represented in many ways. We use bar graphs , line graphs , and circle graphs to present data in a visual way.

### Bar Graphs

A bar graph is used to display the
*
frequency of data in categories
*
, using vertical or horizontal bars. You can easily compare the categories using a bar graph. The bar graph below shows the incarceration rates of different countries. Prisoners per
$100,000$
of the population of the country(
$2005$
).

### Line Graphs

Line graphs usually show how
*
values change over a period of time
*
. A line graph displays data using line segments.

The line graph below shows the daily high temperature of Placerville , California recorded over a week.

### Circle Graphs

Circle graph is used to
*
compare parts of the data to the whole
*
. The entire circle represents
$100\%$
of the data and each sector represents a percent of the total.

The circle graph below shows the results of a survey that asked teen hobbies, ages $13$ to $19$ .