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2.3 Concept Prep Assignment: Graphs of Exponential Functions

 

Make a table of values of inputs and outputs for the exponential function with an initial value of 1 and a growth factor of 2   .  Be sure to include both positive and negative values for inputs.  Choose at least 8 values as inputs. 

 

x

y

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Make a sketch of your graph here:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Repeat the above for  and   then answer the following questions.

 

a.    Describe, in words, the characteristics of the graphs.

b.    How are all three graphs similar?

c.    How are they different from each other?

d.    What are possible values for the input ?

e.    Complete:  as ,   ???

                                          as   , ???  

f.    Will the output ever be 0?  Why or why not?

g.    Will the output ever be negative?  Why or why not?

h.    For what values of x is   

i.      For what values of x is   

j.     Write a formula for an exponential function whose graph hugs the y-axis

            more closely, i.e. is narrower than the graphs you sketched above.

k.    Predict where the graphs of  would be located on your                

      graph then test your prediction on your graphing calculator.                 

 

 

 

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