1. 6th Grade Math HOMEWORK
Page 303 #1-8

2. 6-8 Misleading Graphs Warm Up Problem of the Day Lesson Presentation
Course 1
Warm Up
Problem of the Day
Lesson Presentation

3. 6-8 Misleading Graphs Warm Up
Course 1
6-8
Misleading Graphs
Warm Up
Use the data below to answer each question.
1. What is the median?
2. What is the mode?
3. What is the range? 36
none 33

4. 6-8 Misleading Graphs Problem of the Day
Course 1
6-8
Misleading Graphs
Problem of the Day
Nine students in a group found that their mean score was 86 for the first math test. On the next test, each student in the group scored 7 points higher than on the first test. What was their mean score for the two tests?
89.5

5. Learning Goal Assignment
Course 1
6-8
Misleading Graphs
Learning Goal Assignment
Learn to recognize misleading graphs.

6. Additional Example 1A: Misleading Bar Graphs
Course 1
6-8
Misleading Graphs
Additional Example 1A: Misleading Bar Graphs
A. Why is this bar graph misleading?
Because the lower part of the vertical axis is missing, the differences in prices are exaggerated.

7. Additional Example 1B: Misleading Bar Graphs
Course 1
6-8
Misleading Graphs
Additional Example 1B: Misleading Bar Graphs
B. What might people believe from the misleading graph? 1 2 __ 1 2 __
People might believe that Cars B and C cost 1 – 2
times as much as Car A. In reality, Cars B and C are only a few thousand dollars more than Car A.

8. 6-8 Misleading Graphs Try This: Example 1A Money Raised
Course 1
6-8
Misleading Graphs
Try This: Example 1A
Money Raised
600
580
570
Dollars
560
550
540
530
4th graders 5th graders 6th graders
A. Why is this bar graph misleading?
The vertical axis begins at 530 rather than 0.

9. 6-8 Misleading Graphs Try This: Example 1B Money Raised
Course 1
6-8
Misleading Graphs
Try This: Example 1B
Money Raised
600
580
570
Dollars
560
550
540
530
4th graders 5th graders 6th graders
B. What might people believe from the misleading graph?
That the 5th graders have raised twice as much money as the 4th graders.

10. Additional Example 2A: Misleading Line Graphs
Course 1
6-8
Misleading Graphs
Additional Example 2A: Misleading Line Graphs
A. Why are these line graphs misleading?
If you look at the scale for each graph, you will notice that the April graph goes from 54° to 66° and the May graph goes from 68° to 80°.

11. Additional Example 2B: Misleading Line Graphs
Course 1
6-8
Misleading Graphs
Additional Example 2B: Misleading Line Graphs
B. What might people believe from these misleading graphs?
People might believe that the temperatures in May were about the same as the temperatures in April. In reality, the temperatures in April were about 15 degrees lower.

12. Additional Example 2C: Misleading Line Graphs
Course 1
6-8
Misleading Graphs
Additional Example 2C: Misleading Line Graphs
C. Why is this line graph misleading?
The scale goes from $0 to $80, and then increases by $5.

13. 6-8 Misleading Graphs Try This: Example 2A November September Week
Course 1
6-8
Misleading Graphs
Try This: Example 2A
November
September
Temperature (°F)
Temperature (°F)
Week
Week
A. Why are these line graphs misleading?
If you look at the scale for each graph, you will notice that the September Graph goes from 85° to 70° and the November graph goes from 65° to 50°.

14. 6-8 Misleading Graphs Try This: Example 2B November September Week
Course 1
6-8
Misleading Graphs
Try This: Example 2B
November
September
Temperature (°F)
Temperature (°F)
Week
Week
B. What might people believe from these misleading graphs?
People might believe that the temperatures in September were about the same as the temperatures in November. In reality, the temperatures in September were about 20 degrees higher.

15. 6-8 Misleading Graphs Try This: Example 2C
Course 1
6-8
Misleading Graphs
Try This: Example 2C
Stock prices
Corp. C
Corp. D 80 70
Price of stock ($) 60 50
Year
C. Why is this line graph misleading?
The scale goes from $0 to $50, and then increases by $10.

16. 6th Grade Math HOMEWORK
Page 303 #1-8

17. Insert Lesson Title Here
Course 1
6-8
Misleading Graphs
Insert Lesson Title Here
Lesson Quiz
1. Why might this line graph be misleading?
2. What might people believe from the graph?
The scale does not start at zero.
Possible answer: that there were hardly any visitors on Monday