Question

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?
A ) 54.36 inches
B ) 65.84 inches
C ) 66.55 inches
D ) 69.36 inches

Answer 1

For this case what you should do is use the linear equation that Bryce wrote and replace the corresponding value of y which is 67.5 inches. Then, you must clear x to find the height.
 We have
 y = 1.123x-6.443
 67.5 = 1.123x-6.443
 Clearing x
 x = (67.5 + 6.443) / (1.123) = 65.84
 The best prediction of Riley's height is 65.84 inches.
 answer
 B) 65.84 inches

Answer 2

Answer:

B

Step-by-step explanation:

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