I'm completely lost. I'm not understanding what the straight line method is supposed to be and I'm not sure I'm adsigning the right accounts to the debits and credits. Please help

16 Paste B 1 -- A - 0 Meige & Center $ - % 52 Conditional Forerutting Chpooard fant Alignment Number E15 F Office supplies adjustment goes here 1000 5 6 7 11 Dec Depreciation Expense Accumulated Depreciation 31-Dec INTEREST EXPENSE Interest Payable 31-Dec 600.00 9 120.00 10 11 Interest adjustment goes here 600.00