19. For the following data sets, which show a relationship?

Sample A Sample B Sample C Sample D X

Y X

Y X

Y X

Y 1

10 20 40 13 20 92 71 1

10 20 42 13 19 93 77 1

10 22 40 13 18 93 77 2

20 22 41 13 17 95 75 2

20 23 40 13 15 96 74 3

30 24 40 13 14 97 73 3

30 24 42 13 13 98 71 Application Questions 35