Best Answer: To manipulate means to change. When you do a scientific experiment, the manipulative variable is the thing you change in order to see what happens. The responding variable is what you measure; it's the thing that changes in response to what you manipulate.
For loans and credit cards, avoid or limit interest charges. While it may sound like a bargain to pay the minimum due on your credit card so you have more money to spend on other things, the long-term costs of this strategy can be staggering.hat's because credit card interest rates can be quite high -- with the best of rates often being in the low double-digits. Instead, try to pay all or as much as possible of your outstanding credit card balance to avoid interest charges.
1 To determine a daily periodic rate, divide the APR by 365 days. Check out our 0% intro APR credit cards.  An interest charge is the sum of interest on your credit card account. The interest charge is broken down by transaction type: purchases, cash advances and balance transfers. If you pay less than the full balance, pay after the payment due date (or if your credit card does not have a interest free period) then you will pay interest on those purchases.