LOGARITHMIC FUNCTIONS Graphing And Analysis (Page 3 of 8)

A logarithmic function of any base can be graphed by using the change of base formula. To do this, convert the base to either 10 or e.

As an example, let's graph the logarithmic function f(x) = 1-LOGbase6(x+2). First convert the base 6 logarithm to common logarithms (natural logarithms could also be used): f(x) = 1-log(x+2)/log6. Enter this as function Y1.

 Y= key. CLEAR key.

 1 Minus key. LOG key. X,T,theta,n key. Plus key. 2 Right parenthesis key. Divide key. LOG key. 6 Right parenthesis key.

 Calculator screen image.
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