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 [math]P[/math](1 + [math]r[/math])[math]^n[/math], where [math]P[/math] represents the initial amount deposited, [math]r[/math] represents the interest rate, [math]n[/math] represents the number of months that pass.
How does a change in each variable affect the value of the expression?