your sister is looking for a way to increase the amount of interest on her savings account. what should she do?

She should deposit more money in her account to increase the amount of interest on her savings account.

Explanation:

If she deposits extra money into her account the proportion of interest can earn her extra money. For example; Imagine if she deposits $100 into her bank account and that she will have weekly interest on her account, she will earn $9 every week on interest. Now imagine if she deposits $200 into her bank account with the same interest. she will earn $18 every week with same interest. The extra money is within the account, the additional interest she will earn. It also depends on if she got compound interest. With compound interest, she will earn interest high than she earned already. The calculated interest will be included the interest she already got.