According to the University of Chicago, as men age, their cholesterol level goes up

According to the University of Chicago, as men age, their cholesterol level goes up. A new drug (XAB) is being tested to determine if it can lower cholesterol in aging males and at what dose. The data for the first test subject is below:

?Dose (mg) ?2? 3 ?5 ?6 ?8 ?10 
Cholesterol level (mg/dL) 310 ?124?201 ?110 ?52?20

a. Plot the data and include a regression line in StatCrunch. Copy and paste your graph into your Word document for full credit.
b. What is the correlation coefficient r and what does it mean in this case?
c. What is the coefficient of determination and what does it mean in this case?
d. Is there a statistically significant correlation between dose and cholesterol level in this case?
e. What is the predicted cholesterol level for a person taking a dose of 4 mg? What about if they are not taking the drug at all (0 mg)?