A Random Sample of Patients Who Attended a Clinic Was

Multiple Choice

A random sample of patients who attended a clinic was selected. The age of the patient (years) and the number of days since the last visit were collected and are displayed in the figure below. The least-squares regression line for predicting number of days since the last visit from the age of the patient is y = 600.081 - 8.694x. Using this line, you predict that the number of days since last visit to the clinic for a 50-year-old patient will be about

A) 63 days.
B) 78 days.
C) 165 days.
D) 200 days.
E) 252 days.