Why do you think using a bowling ball helped to give us straight lines on the graphs?

the one that is being graphed is the speed of the bowling ball (distance VS time)… there were 6 lines, labeled from 0m to 25m, each was 5 spaced distances… there were students that were assined in each line,,, as the bowling ball passes each line, student will record the time in seconds… everyone would start their stopwatches at the same time…
why not marbles? or a baseball?

Brunswick C System Maxxed Out
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End Date: Friday Apr-18-2014 22:51:07 PDT
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