The exponential function that represents the value of the baseball card is y = $8(1.05^t).
An exponential function is usually in the form: y = m^x. When the value of the baseball increases, it means that it is appreciating with the passage of time.
The formula that can be used to represent appreciation is:
FV = P (1 + r)^n
y = $8(1.05)^t
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