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6 April, 00:59

The equation y = 6.3x + 67.4 is the equation of a linear model in a scatter plot comparing the ages of boys between 2 and 10 years old (x) and their average heights in centimeters (y). What is the average height of a 5-year-old boy?

98.9 cm

78.7 cm

67.4 cm

62.4

+5
Answers (2)
  1. 6 April, 02:39
    0
    The average height of a 5 year-old-boy (x = 5):

    y = 6.3 x + 67.4

    y = 6.3 * 5 + 67.4 = 31.5 + 67.4 = 98.9

    Answer:

    A) 98.9 cm
  2. 6 April, 04:34
    0
    Y = 6.3x + 67.4

    The average height of a 5 year old boy is

    6.3 (5) + 67.4 = 31.5 + 67.4 = 98.9 cm
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