1. GRAPHS

2. Types of Graphs  Bar graph  Line graph  Pie graphs  Histogram

3. Bar Graph  Definition:  A chart with rectangular bars with lengths proportional to the values that they represent.  Used for comparing two or more values

4. Line Graph  Definition:  A graph that uses points connected by lines to show how something changes in value (as time goes by, or as something else happens).  Independent Variable- on X axis  Dependent Variable- on Y axis

5. Pie (circle) Graph  Definition:  A circular chart divided into sectors, illustrating relative magnitudes or frequencies.  It shows parts of a whole. Fixed quantity broken into parts.

6. Histogram  Definition:  Histograms resemble bar charts closely. One main difference is that histograms will normally be shown with the bars touching each other, with no spacing between, to account for the continuous nature of the data, whereas simple bar charts tend to have spaces to separate the bars.

7. Which Graph?  Given the following sets of data, decide which of the four types of graphs would be most appropriate to display the data.

8.  During World War 1 there were many fatalities; the French accounted for 25%, British Empire 16%, Russian Empire 30%, Italy 12%, Serbia 8%, US 2% and others about 1%.  What would be the best way to represent this information?

10.  We want to compare the amount of TV watched amongst the students in our class.  What would be the best graph to represent this information?

12.  We want to compare the temperatures in New York City over the past 10 days.  What would be the best graph to represent this information?

14. NOW….  Get out your pieces and parts of a lab report: Investigation into Popcorn Sheet.  Lets find out what graph would work best, and complete the conclusion section!