A student applied a force $$\(F\)$$ to a rubber band. The student measured the corresponding extension, $$\(\Delta x\)$$, as $$\(F\)$$ was increased and then decreased. The graph shows how $$\(\Delta x\)$$ varied as $$\(F\)$$ was increased and then decreased. State how the graph shows that the rubber band deformed elastically. (1) .............................................................................................................................................................................................................................................. ..............................................................................................................................................................................................................................................

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