Which of the following is NOT a type of mortgage classified according to repayment provisions?

The classification of mortgages according to repayment provisions typically includes types that outline how a borrower repays the loan over time. An amortized mortgage is structured so that the payments made over the life of the loan fully pay off the principal and interest by the end of the term. A straight mortgage, in contrast, requires interest payments only during the term, with the entire principal due at maturity. Partially amortized loans combine elements of both, where some of the principal is paid down over the term, but there is a remaining balance due at the end.

Equity, however, does not refer to a mortgage type under the repayment provision classification. It relates more to ownership interest in a property, representing the difference between the market value of a property and the amount owed on any mortgages or liens against it. Therefore, equity is not a specific repayment structure but a financial measure of ownership, making it the correct answer to the question regarding types of mortgages classified by repayment provisions.