| http://www.w3.org/ns/prov#value | - months Joe Smith - 8% increase Lewis May - 6% increase UPDATE: More detail on % Change The % Change could be calculated using linear regression, (least-squares-fit would be suitable), the average change is effectivly the y-difference on a line-of-best-fit, where each point is a race, x is the race_date and y is the average_speed for that race.
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