(3 3 4 5 5 7 9 10 12 1215 20 25 20 10 20 35 25 15 35-4 -4 -3 -2 -2 0 2 3 5 5-7 -2 3 -2 -12 -2 13 2 -7 1328 8 -9 4 24 0 26 6 -35 6570220117
S X = 3,52
S Y = 8,198
S XY =