The graph to the right gives the percent of persons 25 years and over who have completed four or more years of college. a. Use the method of least squares to obtain the straight line that best fits these data. b. Estimate the percent for the year 2008. c. If the trend continues, when will the percent reach 32?

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The graph to the right gives the percent of persons 25 years and over who have
completed four or more years of college.
Percentage of College Graduates
40-
35-
a. Use the method of least squares to obtain the straight line that best fits these
data.
b. Estimate the percent for the year 2008.
c. If the trend continues, when will the percent reach 32?
30-
27.9
29.6
ll
23-
20 19.3
21.1 233 25.6
15-
10-
5-
1985 1990 1995 2000 2005 2010
(a) Use the method of least squares to obtain the straight line that best fits this data. Make the numbers more manageable by counting years beginning with 1985.
The least-squares line is y =x+
(Type an integer or decimal rounded to the nearest hundredth as needed.)
Transcribed Image Text:The graph to the right gives the percent of persons 25 years and over who have completed four or more years of college. Percentage of College Graduates 40- 35- a. Use the method of least squares to obtain the straight line that best fits these data. b. Estimate the percent for the year 2008. c. If the trend continues, when will the percent reach 32? 30- 27.9 29.6 ll 23- 20 19.3 21.1 233 25.6 15- 10- 5- 1985 1990 1995 2000 2005 2010 (a) Use the method of least squares to obtain the straight line that best fits this data. Make the numbers more manageable by counting years beginning with 1985. The least-squares line is y =x+ (Type an integer or decimal rounded to the nearest hundredth as needed.)
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