The medan annual ncome of a populaton for selected years between 1960 and 2009 s

ID: 2981900 • Letter: T

Question

The medan annual ncome of a populaton for selected years between 1960 and 2009 s shown n the table to the rght.

A) Fnd the quadratc functon that models the medan ncome as a functon of x, the number of years after 1960. y=

B) Use the unrounded model from part (a) to estmate the medan annual ncome of the populaton n 1996 and n 2015.

C) Do you feel that the estmate for 2015 s relable? Explan.

1960---4110

1970---6734

1980---12577

1990---20420

2000---28858

2001---29377

2002---29327

2003---30247

2004---31050

2005---31844

2007---33470

2008---33618

2009---32182

y =3.688175462 x2- 13990.49021 x+ 13255842.12

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