9) mr. keller bought a new scooter for $900. he used a function to
estimate how its value will depreciate, or decrease over time.
lesson 21
age in years, t
12
value of dollars, vt) $900 $765 $650.25 $552.71
what type of function did mr. keller use to model this relationship?
describe the rate at which the scooter depreciates. write an equation
for the function.

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.