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TE-PNY1123 26 Operations Manual
Before these can be determined, some preliminary algebra is necessary. x,
y, x2, xy, (x)2, (y)2, n, y, and x need to be determined.
17. x = 1.632 + 1.529 + 1.483 + 1.435 + 1.316 = 7.395
18. y = 2.34 + 2.21 + 2.15 + 2.07 + 1.94 = 10.71
19. x2 = (1.632)2 + (1.529)2 + (1.483)2 + (1.435)2 + (1.316)2 = 10.991635
20. y2 = (2.34)2 + (2.21)2 + (2.15)2 + (2.07)2 + (1.94)2 = 23.0307
21. xy = (1.632)(2.34) + (1.529)(2.21) + (1.483)(2.15) + (1.435)(2.07) +
(1.316)(1.94) = 15.90991
22. n = 5
23. x = x/n = 1.479
24. y = y/n = 2.142
25. (x)2 = (7.395)2 = 54.686025
26. (y)2 = (10.71)2 = 114.7041
Inserting the numbers:
27.
  
 
28.
  
 
29.
  
 
30. slope = 0.05443
31. slope = 1.2827484
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