You Wish to Describe the Relationship Between Exam Grades and the Amount

Multiple Choice

You wish to describe the relationship between exam grades and the amount of time students watch the Discovery Channel. The correlation turns out to be r = +0.30. What does this mean?

A) The more a student watches the Discovery Channel, the higher his or her exam grades tend to be.
B) The more a student watches the Discovery Channel, the lower his or her exam grades tend to be.
C) In order to increase your exam grades, it is recommended that you spend more time watching the Discovery Channel.
D) 30% of the variation in exam grades is explained by the linear relationship with time spent watching the Discovery Channel.