In General, a Regression Line Is Used to

In general, a regression line is used to

A) make a prediction about a person's score on one variable, based on the person's score on a different variable.
B) assess the magnitude of the relationship between two variables, based on sets of scores from the same people.
C) assess the direction of the relationship between two variables, based on sets of scores from the same people.
D) determine whether results of a study are statistically significant, based on a sample from the population.