a: control variable ~
b: the finnish line in a race


The finish line in a race is there as a reference point for the racers, the judges and the audience. This is true for track and field, auto racing and horse racing. Its key characters? It is clearly defined and does not move. So as the race participants run over it,it is possible to determine who won the race. Likewise a controlled variable in any valid experiment is clearly defined and does not change. They are both static reference point.

Writer: Not Stated
Where: Reference Link Has Evaporated
Date: Nov 18 2017 6:34 PM

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