A Patient Is Injected with the Drug and the Concentration

Multiple Choice

A patient is injected with the drug and the concentration (units/cc) in the patient's blood is measured every hour for seven hours. Re-expressing these data result in the
Following model and residual plot. What is true about the predicted concentration
Level after 10 hours has elapsed?
Log(Concentration) = 1.79 - 0.169 Time Elapsed.
S = 0.00565191 R-Sq = 100.0%

A) The predicted value is 1.259 units/cc.
B) This value is considered an extrapolation.
C) This value is accurate because R2 = 100%.
D) Both A and B.
E) All of the above.