1. Presenting Data Table vs. Graph Why do you think information is often presented in graphs instead of just in a list or table? What are some kinds of graphs? Bar graph Line graph Pie chart Visual representations to display a relationship not apparent in data tables

2. Bar Graph When would you use a bar graph? -Categories -Changes over time -When trying to measure change over time, bar graphs are best when the changes are larger. Source: http://illuminations.nctm.org/LessonDetail.aspx?id=L42http://illuminations.nctm.org/LessonDetail.aspx?id=L42

3. What is the best way to present this data? ’04 1 ’05 5.5 ’06 12 ’07 50 ’08 100 ’09 300 ‘10 550 ‘11 700 Number of Facebook users in Millions

4. Line Graph

5. When smaller changes exist, line graphs are better to use than bar graphs. Line graphs can also be used to compare changes over the same period of time for more than one group.

6. Line Graphs Which should you use more in science?

7. Where do we see line graphs?

8. Pie Chart Pie charts are best to use when you are trying to compare parts of a whole. They do not show changes over time.

9. Reading Graphs- Practice! Identify the graph that matches each of the following stories: a. I had just left home when I realized I had forgotten my books so I went back to pick them up. b. Things went fine until I had a flat tire.. But then I fixed it! c. I started out calmly, but sped up when I realized I was going to be late. Ource: http://staff.tuhsd.k12.az.us/gfoster/standard/bgraph2.htmhttp://staff.tuhsd.k12.az.us/gfoster/standard/bgraph2.htm Answers: a. iv b. ii c. i

10. Graphing Format Source: http://science-fair-coach.com/wp-content/uploads/2011/12/Slide2.jpg X-axis Y-axis