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11 March, 14:20

Bryce wrote the linear regression equation y = 1. 123x-6.443 to predict the armspan, y, of a person who is x inches tall. Riley has an armspan of 67.5 inches. Which is the best prediction of Riley's height?

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  1. 11 March, 14:32
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    I am writing THe given equation is y = 1.123x - 6.443 where y represents the armspan and x represents the height. Now we need to find the height, when armspan = 67.5 inches. SO we need to plug 67.5 for y and solve for x that is

    67.5 = 1.123x - 6.443

    adding 6.443 to both sides

    67.5 + 6.443 = 1.123x

    73.943 = 1.123x

    Dividing both sides by 1.123

    x = 65.84 inches.

    So for the given armspan of 67.5 inches, height is 65.84 inches.
  2. 11 March, 14:40
    0
    B.

    Step-by-step explanation:

    got it right
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