Lesson_25-1

Lesson_25-1 - catalogs are requested by Dec 1 x y xy x 2 Σ...

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Lesson 25 Plot the given points and use the formula to find the corresponding least-squares line. 4. ) , ( ); , ( ); , ( ); , ( 0 6 2 3 4 2 5 1 x y xy x 2 Σ 5. ) , ( ); , ( ); , ( ); , ( 5 5 3 2 2 2 2 1 x y xy x 2 Σ 6. ) , ( ); , ( ); , ( ); , ( ); , ( 2 1 1 0 0 1 0 3 1 4 - - - - x y xy x 2 Σ 7. ) , ( ); , ( ); , ( ); , ( ); , ( 1 6 2 4 3 2 4 0 5 2 - x y xy x 2 Σ

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17. Over the past 4 years, a college admissions officer has compiled the following data (measured in units of 1000) relating to the number of college catalogs requested by high school students by December 1 to the number of completed applications received by March 1: Catalogs requested 4.5 3.5 4.0 5.0 Applications received 1.0 0.8 1.0 1.5 Plot on a graph; find the equation of the least squares line, and use the line to predict how many completed applications will be received by March 1 if 4,800
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Unformatted text preview: catalogs are requested by Dec 1. x y xy x 2 Σ 18. A company’s annual sales (in units of 1 billion) for its first 5 years of operation are shown: Year 1 2 3 4 5 Sales 0.9 1.5 1.9 2.4 3.0 Plot on a graph; find the equation of the least squares line, and use the line to predict sixth-year sales. x y xy x 2 Σ 22. The table gives the U.S. decennial census figures (in millions) for 1950-2000. Year 1950 1960 1970 1980 1990 2000 Populatio n 150. 7 179. 3 203. 2 226. 5 248. 7 291.4 Find the equation of the least squares line; use to predict the population for the year 2010. x y xy x 2 Σ...
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This note was uploaded on 04/12/2011 for the course MA 224 taught by Professor Swohead during the Winter '09 term at Purdue.

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Lesson_25-1 - catalogs are requested by Dec 1 x y xy x 2 Σ...

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