12) 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).

x14 30 48 28 50 25

y 2 4 5 5 9 3

Complete parts (a) through (e), given Σx = 195, Σy = 28, Σx2 = 7309, Σy2 = 160, Σxy = 1053, and r ≈ 0.847.

(b) Verify the given sums Σ