Compare Exponential and Power Functions

Exponential functions and power functions are compared interactively, using an applet. The properties such as domain, range, x and y intercepts, intervals of increase and decrease of the graphs of the two types of functions are compared in this activity.



The properties of exponential functions of the form

f(x)= a x

and power functions of the form

g(x)= x a


are compared interactively by changing parameter a which is the base in the exponential function and the power in the power function. a takes integer values from 2 to 9.

Interactive Tutorial

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  1. Click on the button above "click here to start" and maximize the window obtained.

  2. Use the slider to change parameter a and compare the domains of both functions.

  3. Use the slider to change parameter a and compare the ranges of both functions.

  4. Use different values of a and explain which type of functions grows faster as x takes larger positive values.

  5. Change a and examine the interval(s) of increase and decrease of the types of functions. Conclude.

  6. Does the exponential function have an x intercept? Change a and examine the x intercept of the power function.

  7. Compare the y intercept of the graphs of the two types of functions.


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Updated: 2 April 2013

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