For Savings, the green line in the graph shows the amount that you
contributed (the sum of the principal and monthly contributions), and the blue
line shows the amount you contributed plus interest.
For Credit Card, the red line shows the initial balance, and the blue
line shows the current balance. The green line shows the total amount paid. The
difference between the red line and the green line is the "cost of credit,"
which is the cost of using a credit card instead of paying cash.
For Stock Market, you can set your investment risk to high, moderate,
or low. The potential for return is greatest when the risk is high, but the
potential for loss is also extremely likely. The green line shows the amount
invested, and the blue line shows the amount you contributed plus earnings. If
multiple simulations are run using the "Generate New Values" button, the
previous high and low results are displayed. To clear the graph, change the
principal, monthly contribution, or length of investment, or click the "Reset
and Start Again" button.
For Credit Card, change the parameters for a monthly payment of 2% and a
minimum payment of $20. How long will it take to pay off a $1,000 balance at
that rate? What is the cost of credit for this situation?
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