Robert Hooke stated that if an object is elongated by a distance x, then the restoring force F exerted by the object is proportional to x. This can be summarized in the equation F = -kx, where k is a constant. Which is this information known as: the theory of elasticity or the law of elasticity? The theory of elasticity, because theories are well-tested, widely accepted explanations that combine several hypotheses and observations.

The theory of elasticity, because theories are a possible explanation of or an answer to a scientific question based on prior knowledge or research.

The law of elasticity, because laws are statements about how something behaves or functions in the natural world.

The law of elasticity, because laws are developed on the basis of experimentation, but they are not explanations.