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Smalltown Teens With Cells Phones 800 842 590 600 530 4304 Nurnber of Teens 400 Copyright © 2007 Mrs. Glosser's Math Ooodies, Inc. All Rights Reserved. httpdowy mathgoodies com 341 273 229 200 07 13 14 15 16 17 18 19 Age in Years Use the graph of the number of cellphones owned by teenagers in a particular town to answer the following questions. a. What two variables are represented? b. How would you describe the general relationship between the two variables? c. What age does not fit the general trend in the data? d. If the graph continued to age 20, what value might you expect?



Answer :

The best line = ( something ) x + (something else)

after doing regression, we find that the best line hast the following formula

y = 71.5 x - 710.42857

For this case,

x = 20 , then

y = 71.5 *(20 ) - 710.42857 = 719.57 so if the graph continued to age 20, it would have value 719.57 .

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