The administrator of a school based in a large country was analyzing the average ...

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Test Score (y)

Math Degree (x1)

Age (x2)

Income (x3)

73.9

77

52

44.4

59.4

48

32

49.0

64.6

33

50

52.6

59.8

25

43

39.6

58.8

25

40

40.7

58.7

39

33

38.0

68.5

71

37

25.1

54.7

24

48

46.5

61.7

25

47

38.4

81.6

49

50

44.6

83.7

56

59

54.8

62.5

46

40

38.5

68.2

75

41

44.8

51.1

25

51

39.9

44.0

46

38

55.6

65.7

68

45

44.1

69.6

27

49

47.5

54.5

23

31

40.0

56.5

48

38

40.2

44.8

41

38

28.3

72.6

79

39

44.8

65.3

76

43

34.5

64.9

31

39

28.0

69.8

63

49

51.4

75.3

72

49

55.2

57.0

30

23

24.6

52.8

62

34

29.7

71.3

75

36

32.1

55.2

43

35

32.6

62.6

64

50

37.4

58.2

44

45

42.9

71.8

46

29

34.4

69.9

35

39

45.6

70.1

63

34

52.9

66.1

56

36

22.1

71.7

57

59

55.1

68.8

41

40

33.7

45.0

27

40

19.8

61.9

37

44

48.2

56.0

36

56

55.9