Final answer:
Jonathan Company's accounting journal entry, with a debit to supplies and a credit to accounts payable, signifies a purchase of supplies on credit. This transaction reflects an increase in supplies and an increase in liabilities.
Step-by-step explanation:
When Jonathan Company's journal shows a debit to supplies and a credit to accounts payable, it indicates that the company has purchased supplies on credit. In accounting, a debit to the supplies account increases the supplies expense or asset, depending on how the company classifies supplies. Conversely, a credit to accounts payable signifies that the company has a liability to pay the supplier in the future. This transaction is an example of the double-entry accounting system where every transaction has a corresponding and opposite entry in another account.