Graphing and Estimation

1
Graphing
2
What is a Graph?

• A Graph is a chart or drawing that shows the
  relationship between changing things.
• There are 3 types of graphs that we will be
  talking about today.

3
Bar Graphs

• The first type of graph we will be talking about
  is a Bar Graph
• Bar Graphs can be used to show how something
  changes over time or to compare data.
• They have an X and Y axis.

Y Axis
X Axis
Activity
4
Line Graphs

• Line Graphs also show how something changes over
  time.
• They have an X and Y axis.
• Line graphs are useful when you have a small
  amount of data over a short period of time.

5
Pie Charts

• Pie Charts are circular graphs used to compare
  information.
• It is used to compare parts of a whole.
• For example if you wanted to see how you spend a
  whole day at school by looking at all the
  different things you do you would use a pie chart.

How I Spend My School Day
English
Spelling
Math
Reading
Science/S.S.
6
What are we doing today?

• Today we will be making our own bar graphs using
  data we will collect in class
• Review Who remembers what a bar graph is?

7
Classroom Birthdays
January February March April May June
July August September October November December
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Classroom Birthdays
July 4 August 3 September 2 October
0 November 1 December 1
January 3 February 0 March 5 April 6 May
2 June 0
9
Our Bar Graph

• We will now use the information we have to create
  our own bar graph
• The months of the year will be the X axis
• The number of students will be the Y axis
• Create A Graph

10
Our Classroom Birthdays
11
Lets Review

• What are the 3 types of graphs we talked about?
• Bar graphs
• Line Graphs
• Pie Charts

12
What type of graph did we create today?

• A bar graph that showed the number of birthdays
  we have in each month

Y Axis
X Axis
13
Brain Work

• Subtraction
• January May
• March November
• July September
• Addition
• August October
• December February

14
Brain Work Answers

• January May 1
• March November 4
• July September 2
• August October 3
• December February 1