Final answer:
Buyer A most likely signed a fixed-rate mortgage, a loan where the monthly payment stays the same over the term and includes parts of both principal and interest.
Step-by-step explanation:
Buyer A has most likely signed a fixed-rate mortgage. This type of loan is characterized by a constant monthly payment that includes both the principal and interest components.
The loan's total amount will be paid off with the last payment, assuming all payments are made on time.
A mortgage is akin to a line of credit for purchasing a home, where typically, a down payment is made upfront—often suggested to be around twenty-percent of the home's purchase price.
For example, on a $100,000 home, a $20,000 down payment would be standard, with the remaining balance financed through a mortgage loan.
The interest rate of a mortgage, along with the loan's term and principal amount, dictates the monthly payment required over the life of the loan.