Hooke's Law and Graph Interpretation Steps:

• Hooke's law states F = kΔL, where F is force and ΔL is extension, predicting a linear force-extension graph.
• Elastic potential energy U = (1/2)FΔL = (1/2)k(ΔL)^2, predicting a parabolic U-ΔL graph.
• Without a described graph shape or axes labels, the variation cannot be uniquely identified.
• The question lacks details on the plotted variation, making options ambiguous.

Not enough information.

Final answer: Not enough information.