CID 64.Poverty The following table gives the number of families  under the poverty level in the U.S. in recent years. Source:  U.S....

CID 64.Poverty The following table gives the number of families 

under the poverty level in the U.S. in recent years. Source: 

U.S. Census Bureau. 

Year 

Families Below Poverty 

Level (in thousands) 

2000 6400 

2001 6813 

2002 7229 

2003 7607 

2004 7623 

2005 7657 

2006 7668 

2007 7835 

2008 8147 

a. Find a linear equation for the number of families below 

poverty level (in thousands) in terms of x, the number of 

years since 2000, using the data for 2000 and 2008. 

""Z■ =MB APPLICATION 

42 CHAPTER 1Linear Functions 

b. Repeat part a, using the data for 2004 and 2008. 

c. Find the equation of the least squares line using all the data. 

Then plot the data and the three lines from parts a—c on a 

graphing calculator. 

N d. Discuss which of the three lines found in parts a—c best 

describes the data, as well as to what extent a linear model 

accurately describes the data. 

ISM 

e. Calculate the correlation coefficient.