CCGPS CA 1.1.2 Example 3

Author:
Walch Education
Money deposited in a bank account earns interest on the initial amount deposited as well as any interest earned as time passes. This compound interest can be described by the expression , where represents the initial amount deposited, represents the interest rate, represents the number of months that pass. How does a change in each variable affect the value of the expression?
GeoGebra Applet
  1. Refer to the given expression: .
  2. Changing the value of does not change the value of the factor , but it will change the value of the expression by a factor of . In other words, the change in will multiply by the result of .
  3. Similarly, changing changes the base of the exponent (the number that will be multiplied by itself), but does not change the value of . This change will affect the value of the overall expression.
  4. Changing changes the number of times will be multiplied by itself, but does not change the value of . This change will affect the value of the overall expression.
This applet is provided by Walch Education as supplemental material for the CCGPS Coordinate Algebra program. Visit www.walch.com for more information on our resources.

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