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Unit 3 Test 2 Review

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					CCGPS Coordinate Algebra                                               Name:
Review for Unit 3 Test 2                                               Period:             Date:      ___


Make a table of values, graph and complete information for the following exponential growth and decay
functions. .

   1. Make a table of values and graph the function       =         . Use -2, -1, 0, 1, and 2 for your input values.

   Is    ) an exponential growth or decay function? Explain.
                                                               Function:
                                     x
                                                               Domain

                                                               Range

                                                               y-intercept

                                                               Asymptote

                                                               End behavior                x→          y→

                                                                                           x→          y→

                                                               Average rate of change in
                                                               the interval




   2. Make a table of values and graph the function       =      – 3. Use -2, -1, 0, 1, and 2 for your input values.

   Is   ) an exponential growth or decay function? Explain.

                                     x                         Function:
                                                               Domain

                                                               Range

                                                               y-intercept

                                                               Asymptote

                                                               End behavior                  x→          y→

                                                                                             x→           y→

                                                               Average rate of change in
                                                               the interval
3. Make a table of values and graph the function       =2       Use -2, -1, 0, 1, and 2 for your input values.

Is   ) an exponential growth or decay function? Explain.

                                                            Function:
                                                            Domain

                                                            Range

                                                            y-intercept

                                                            Asymptote

                                                            End behavior               x→         y→

                                                                                       x→         y→

                                                            Average rate of change
                                                            in the interval




4. Make a table of values and graph the function       =             Use -2, -1, 0, 1, and 2 for your input values.

Is   ) an exponential growth or decay function? Explain.

                                                             Function:
                                                             Domain

                                                             Range

                                                             y-intercept

                                                             Asymptote

                                                             End behavior               x→          y→

                                                                                        x→          y→

                                                             Average rate of change
                                                             in the interval
    Set up a growth or decay equation and solve:

5. Catnip, Mrs. Richer’s 12 lb. tabby cat, has been gaining weight at a rate of 2.5% per year. If she continues at this
   pace, how much will Catnip weigh in two years? Round your answer to the nearest tenth.




6. In science class, you are breeding fruit flies for a genetics experiment. If your class starts with 30 fruit flies and
   they double their number in 6 hours, how many fruit flies will you have in 12 hours? How many in 3 days?




7. A 45 gram mushroom decays by half every week. How many grams will be left of the mushroom after two
   months assuming that there are 4 weeks in a month? Round your answer to the nearest thousandth.




8. A car depreciates by 12% per year. If you paid $35000 for the car, how much will the car be worth after two
   years?




9. When an antibiotic is added to a culture of bacteria, the number of bacteria decays by .5% every 2 hours. If
   there were originally 40,000 bacteria, how much will be left after 1 week?




10. You invested money at 6.3% interest per year 3 years ago. You have $4000 now. How much did you have when
    you started? How much will you have 5 years from now?

				
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