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.
Disadvantages. 1  Blowing Your Budget -- The biggest disadvantage of credit cards is that they encourage people to spend money that they don't have. 2  Most credit cards do not require you to pay off your balance each month, so even if you only have $100, you may be able to spend up to $500 or $1,000 on your credit card. This is how they make their money and this is how most people in the United States get into debt (and even bankruptcy.) Consider this: If you have a $100 in savings, most banks will give you at the most 2.0 to 2.5% interest on your money over the course of the year.