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Question
A doctor collected data to determine the association between age of an infant and its weight. She modeled the equation y = 1.25x + 7 for the line of best fit. The independent variable, x, is time in months and the dependent variable, y, is weight in pounds. What does the y-intercept mean in this context?
Responses
A The infant's starting weight is 7 pounds.The infant's starting weight is 7 pounds.
B The infant's starting weight is 1.25 pounds.The infant's starting weight is 1.25 pounds.
C The infant's weight increases by an additional 7 pounds for each month.The infant's weight increases by an additional 7 pounds for each month.
D The infant's weight increases by an additional 1.25 pounds for each month.
The infant's weight increases by an additional 1.25 pounds for each month.

1 answer

A The infant's starting weight is 7 pounds.
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