At a university, the relationship between college GPA (gpa) and SAT scores (sat) is described by the conditional expectation function e(gpa∣sat)=0.95⋅0.0015⋅sat. What can be inferred from this function?
a) There's a positive linear relationship between GPA and SAT scores.
b) GPA is not affected by SAT scores.
c) SAT scores are dependent on GPA.
d) The relationship between GPA and SAT scores is exponential.