You are given the following information about y and x. 
The least squares estimate of the intercept or b0 equals
Definitions:
Alveolar Ventilation
The process by which air moves in and out of the alveoli, the tiny air sacs in the lungs, allowing for gas exchange with the blood.
Tidal Volume
Volume of air that is inspired or expired in a single breath during regular, quiet breathing.
Respiratory Rate
The number of breaths a person takes per minute, a vital sign used to assess overall health and detect possible medical conditions.
Anatomical Dead Space
The portion of the respiratory system where air does not participate in gas exchange, including the trachea and bronchi.
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