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Based on the data below, is the trend line is positive or negative?

1 2 3 4 5 6 7 8 9 10
27.5 31.5 29.7 28.6 31.4 23.6 22.9 25.5 24.4 23.9

a. positive 15.5
b. negative 0.56
c. negative 0.78
d. positive 391
e. negative 0.88
f. positive 753
g. positive 0.67
h. positive 0.44