6th Grade Math Textbook, Progress

The table and graphs show the number of exercise DVDs

sold during a 5-month period.

Jan. Feb. Mar. Apr. May

6

8

10

12

14

16

18

Sales (hundreds)

Month

DVDs Sold

6

8

10

12

14

16

18

Sales (hundreds)

Jan. Feb. Mar. Apr. May

Month

DVDs Sold

0

2004

Year

2005

2

4

6

Sales (thousands)

DVDs Sold

Month Jan. Feb. Mar. Apr. May

Sales 7.5 10 12 14 16

(hundreds)

0 0

3. Do both graphs show the 4. Which graph would someone use who
   same data? wants to convince you that the sales of
   exercise DVDs have risen dramatically?


4. Why do you get a different impression
   about the data from the two graphs?

The graph at the right shows sales

of pet-training DVDs.

6. How many pet-training DVDs
   were sold in 2004? in 2005?


7. What is misleading about
   this graph?


8. Will had the following test scores: 55, 70, 88, 56, 88, 71, 62.
   He told his friend, “My most typical score was 88” (the mode).
   Explain why Will’s statement is misleading.


9. An advertiser said, “Nine out of 10 dentists agree. Glomb works best.”
   Explain why this statement might be misleading.

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