P.7.1.1-Displaying Data P.7.1.2-Scatter Plots & Correlation 1/26/2015- Per 3, 5 1/27/2015- Per 2, 4, 6

Graph Interpretation Graph Interpretation questions ask you to work with numerical information that is displayed in the form of different types of graphs.

Circle graphs/Pie Charts This graph represents the different nationalities at the cultural festival. 45% Swiss 20% French 10% Greek 15% American 10% Russian

Example: How many American people were at the festival?? *What information do you need to answer this question?

Example If there are 300 total people, then the number of American people… 300 × .15 (total number) × (percent in decimal form)

Example 300 × .15 (total number) × (percent in decimal form) = 45 total American people

Whiteboard CFU 1) How many Swiss people at the festival? 2) How many Greek people?

Whiteboard CFU On your whiteboard, draw a circle graph that represents the distribution of the ages of 60 kangaroos in the zoo. Use the following data: 35% are 1 yr 10% are 5 yrs old 15% are 4 yrs old 20% are 3 yrs old 20% are 2 yrs old.

Continued… Using the information on your circle graph, how many kangaroos are 3 or 4 years old?

Venn Diagrams Venn diagrams use overlapping circles to show sets of things. 18 soccer 6 31 Track

Example Question Based on the Venn diagram, how many girls only participate in soccer? How many girls only participate in track? Soccer= 18 Track= 31

Whiteboard CFU 1) How many girls play soccer in total? 2) How many girls participate in track in total? Soccer= 24 girls Track= 37

Whiteboard- CFU On your whiteboard, draw a Venn diagram that represents the following: At Jordan High, 14 students are taking English Composition and 29 are taking Chemistry, five students are taking both classes.

Whiteboard- CFU Based on the data in the Venn diagram, answer the following questions: 1. How many students are only taking English Compostion? 2. How many total students are taking Chemistry? Show how you know.

P.7.1.2- Scatter Plots & Correlation Correlation is the relationship between variables on a scatter plot and how they affect one another. Positive correlation: as x increases, y increases. Points are forming a line that moves upward. Negative correlation: as x increases, y decreases. Points are forming a line that slopes downward. No correlation: Points are not moving in any particular direction. No relationship between variables.

Example of positive/negative correlation Draw each graph. Decide whether the graph has a negative or positive correlation. Explain how you know. Analyze the graph and form a conclusion about the relationship between the two variables. Write it down next to the graphs.

Example of positive/negative correlation