[PICTURE ATTACHED] HELPP! whenever u answer, tell me which box goes into which of the categories and why. also explain to me what is independent quantity and dependent quantity.

Ebuka's monthly rent is $750. if ebuka pays the rent late, his landlord charges 4% interest per week that the payment is late. write a function that gives the total cost r(t), in dollars, of ebuka's rent if he pays it t weeks late.