Which of the following statements is correct when all the actual values ofyare on an upward sloping regression line?

Select one:

a. The coefficient of correlation is equal to one and the sign of the coefficient of correlation will be negative but the sign of the slope with be positive.

b. The coefficient of correlation and the slope must both be equal to 1.

c. The coefficient of correlation is equal to one and the sign of the coefficient of correlation and the sign of the slope will both be positive.

d. The coefficient of correlation and the slope must be equal to - 1.