how does hubbles law of universal expansion provide evidence to support the big bang theory?

Brief Explanations:

Hubble's Law states that the velocity at which a galaxy is moving away from us is proportional to its distance from us. This implies the universe is expanding. The Big - Bang Theory posits that the universe originated from a singularity and has been expanding ever since. Hubble's Law provides observational evidence for the ongoing expansion of the universe, which is a key prediction of the Big - Bang Theory.

Answer:

Hubble's Law shows the universe is expanding, which is a key prediction of the Big - Bang Theory.