Given the number of hours 9 students spent studying for a test, and their scores on that test, answer the following questions. Use technology, and round to two decimal places.
Hours, x: 0 2 4 5 5 5 6 7 8
Score, y: 40 51 64 69 73 75 93 90 95
Find the correlation coefficient:
a) -0.85
b) 0.92
c) 0.73
d) -0.64