x 13 30 50 28 50 y 1 2 5 5 9 3 (a) Draw a scatter diagram displaying the data. Complete parts (a) through (e) after verifying that Σx = 196, Σy = 25, Σx² = 7,478, Σy² = 145, Σxy = 988, and r = 0.8176. An economist is studying the job market in Denver area neighborhoods. Let x represent the total number of jobs in a given neighborhood, and let y represent the number of entry-level jobs in the same neighborhood. A sample of six Denver neighborhoods gave the following information (units in hundreds of jobs). 25 y (number of entry-level jobs (in hundreds)) 15 20 25 30 35 40 45 50 x (total number of jobs (in hundreds)) (b) Find x (in hundreds). (Round your answer to four decimal places.) x = hundred jobs Find y (in hundreds). (Round your answer to four decimal places.) y = Ŷŷ = hundred jobs y (number of entry-level jobs (in hundreds)) ཋ ྤརྒྱ༞ ࿄ ཤྲུ ཥུ འ Find the equation of the least-squares line ŷ = a + bx. (Round your numerical values to four decimal places.) 6 8 x (total number of jobs (in hundreds)) y (number of entry-level jobs (in hundreds)) 30 35 。 ིི ཨཽ ༅ ཡཾ ཎ ཙ, ཙ 4 x (total number of jobs (in hundreds)) 8 y (number of entry-level jobs (in hundreds)) 15 20 25 30 35 40 45 50 x (total number of jobs (in hundreds))

Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015

1st Edition

ISBN:9781680331141

Author:HOUGHTON MIFFLIN HARCOURT

Publisher:HOUGHTON MIFFLIN HARCOURT

Chapter9: Solving Quadratic Functions

Section: Chapter Questions

Problem 4CA

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An economist is studying the job market in Denver area neighborhoods. Let x represent the total number of jobs in a given neighborhood, and let y represent the number of entry-level jobs in the same neighborhood. A sample of six Denver neighborhoods gave the following information (units in hundreds of jobs). Complete parts (a) through (e) after verifying that Σx = 196, Σy = 25, Σx² = 7,478, Σy² = 145, Σxy = 988, and r ≈ 0.8176. (a) Draw a scatter diagram displaying the data. Find x (in hundreds). (Round your answer to four decimal places.) please answer ALL parts of a-b.