Can someone point me in the right direction so I can answer this ?

Ezra enters into a written contract to purchase a house and lot from Joanne for $80,000. Before the closing, Ezra sees a better house for $70,000 and notifies Joanne that he has changed his mind. What are Ezra's legal rights?

It varies state to state, but this might help:

http://www.wikihow.com › … › Legal Matters › Contracts and Legal Agreements

Generally, a written notice to cancel is what is required, but there are time limit (usually three days, but it varies).