Which of the following is a true statement?

a) The coefficient of determination can assume negative values.

b) A negative correlation indicates that as values of x decrease, values of y will decrease.

c) If there is no correlation between the independent and dependent variables, then the value of the correlation coefficient must be -1.

d) The variable that is being predicted in regression analysis is the dependent variable.

e) The correlation coefficient r is always greater than 1.

f) None of the above