LOGARITHMIC FUNCTIONS Graphing And Analysis (Page 1 of 8)

Because a logarithmic function is the inverse of an exponential function, one way to graph a logarithmic function is to first graph its inverse (the exponential function), then use the DrawInv command.

Let's graph the logarithmic function f(x) = LOGbase2(x) using this method. The exponential function y = 2^x is its inverse. Enter the exponential function as Y1. Then adjust the WINDOW as shown and use Zoom ZSquare to graph the exponential function (this will ensure the y = x reflection appears normal in the next step).

 WINDOW key....

 ZOOM key. 5: menu selection.

 Calculator screen image. Calculator screen image.
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