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Read the Math Notes box in this lesson and then answer the following questions. The cost of a large flat-screen television is decreasing 20% per year.

  1. What is the multiplier?

    Subtract the percent from .

  2. If a -inch flat-screen now costs , what will it cost in three years?

    The equation for an exponential function is:

     initial value
    # of years

  3. Using the same rate, what did it cost two years ago?

    Use the same equation as (b) and do not change the multiplier.

  4. Write the equation of a function to model this situation.