1105_A5_F11 - MAC1105 Activity 5 Fall, 2011 Name: Period:...

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MAC1105 Activity 5 Name: ______________ ___ Fall, 2011 Period: (circle yours) TH 11:00 TH 12:30 TH 2:00 Show algebraic details in spaces provided, and confirm answers with the calculator. 1. The table and graph show N , the number of Americans (in thousands) over 100 years old as a function of the number of years since 1960. That is, x = 0 represents January 1 of 1960, x = 10 represents January 1, 1970, and so on. a) Use regression to find a cubic polynomial model for the data. Do not round off… record all digits shown by the calculator. Calculator output that uses scientific notation (like 2.38948489 E -3) should be simplified by moving the decimal point as needed (like 0.00238948489). y = __________________________________________________________________ b) Use a graphic approach* to predict the calendar year in which this model suggests there were 50 thousand Americans over 100 years old. *Enter the regression poly in
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1105_A5_F11 - MAC1105 Activity 5 Fall, 2011 Name: Period:...

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