Please help

Let x = the midterm exam score and y = the final exam score for students in a large statistics class. The relationship between x and y is studied often. According to the instructor ofthis particular statistics class, those students who had an above average value forxtended to have an above average value for y. In fact, the correlation coefficient was 0.9. a) A high correlation coefficient must imply strong linear correlation between midterm and final exams, correct? b) Does this association imply causation? If not, how can you explain this association