OG详解-OG4 数学1 Q5

Choice A is correct. It’s given that t represents the number of monthly deposits. In the given function f (t)=100 +25t, the coefficient of t is 25. This means that for every increase in the value of t by 1, the value of f (t) increases by 25. It follows that with each monthly deposit, the amount in Hana’s bank account increased by $25.
Choice B is incorrect. Before Hana made any monthly deposits, the amount in her bank account was $100. Choice C is incorrect. After 1 monthly deposit, the amount in Hana’s bank account was $125. Choice D is incorrect and may result from conceptual errors.