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Rate of change from [9,10 ] = [11014 - 4052] / [10 - 9] = 6962
Rate of change on [ 5, 8] = [ 1491 - 75] / [ 8 - 5] = 472
So
6962 / 472 = 14.75 times as great
P.S. - not sure if this is the answer that is wanted...
