Final answer:
The type of agency typically used in a real estate transaction is express agency.
Step-by-step explanation:
In a real estate transaction, the type of agency that is typically used is express agency. An express agency is a type of agency where the agent is explicitly authorized by the principal to act on their behalf. This type of agency is created through a written or oral agreement between the principal and the agent, specifying the agent's authority and responsibilities.
For example, when a homeowner hires a real estate agent to assist with selling their property, an express agency is formed. The homeowner gives the agent the authority to negotiate and enter into contracts on their behalf.