1. 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

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

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

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

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

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

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

8. 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.

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

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

11. 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

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

13. 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.

14. 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.

15. 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.

16. 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.

17. Example of positive/negative correlation