bar graphs

Bar Graphs

Bar graphs have bars. The bars help you compare measurements,
amounts, and changes.

What do you think is the typical amount of letters in the last names of
people in a class?

First gather data about the number of letters of students in class.

Data Table:

Letters
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15 Students

2
13
6
5
2
1
1
1

If you organize the data into a graph you can determine the typical
name length.

1. Write a statement about the name lengths for students in this class.

2. Describe any patterns you see.

3. If a new student joined the class, what would you predict about the
length of that student’s name?

4. Suppose a new student named Jane Smith entered the class. How
would you change the graph to include the data for Jane? (last name)