Martina started with 228 boxes of cookies and sold the same number each day for 4 days. After 4 days of selling, she was left with 100 boxes of cookies. Enter the slope of the line representing the change in Martina's inventory of cookies over this period of time. (boxes per day) I will mark brainliest

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?