Use the Following to Answer the Question(s) Below

Multiple Choice

Use the following to answer the question(s) below.
A newly developed drug is tested to determine absorption levels in a patient's bloodstream. A patient is injected with the drug and the concentration (units/cc) in the patient's blood is measured every hour for seven hours. Below is the output from fitting a linear regression model.
-Which of the following is true?

A) The linear model is absolutely perfect for estimation of the concentration level after 10 hours. The scatterplot shows no bend.
B) This model will probably underestimate the concentration level after 10 hours. The scatterplot shows some bend and suggests that the linear model is not appropriate.
C) This model will definitely overestimate the concentration level after 10 hours, as the scatterplot shows two extreme outliers.
D) The linear model is appropriate for estimation of the concentration level after 10 hours. It explains 89.21% of the variability in blood concentration levels of the drug.
E) The linear model is not appropriate because it explains only 4.72% of the variability in blood concentration levels of the drug.