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.
If you have previously agreed to interest terms on credit that you have extended the customer, it is fairly simple to charge interest on the invoice. However, if you are going to charge the customer interest for being delinquent, the situation can be a little more tricky.redit card companies send a bill or invoice to customers every month to collect on the interest they charge for allowing the customer to borrow money for purchases. Before you charge the customer interest, though, it is important to ensure that you have all of your paperwork squared away.