<PRE><B>Question 992596</B>
&lt;pre&gt;
f(x)=log(3-x)

Logarithms must have a base either understood or written.

Do you mean logarithm with base 10?

log&lt;sub&gt;10&lt;/sub&gt;(3-x)

Or logarithm with base 2, 3, 4, etc.?

log&lt;sub&gt;2&lt;/sub&gt;(3-x), log&lt;sub&gt;3&lt;/sub&gt;(3-x), log&lt;sub&gt;4&lt;/sub&gt;(3-x)?

Or do you mean logarithm with base 

e = 2.718281828459045235360287471352662497757247...?

log&lt;sub&gt;e&lt;/sub&gt;(3-x) which we usually write with ln(3-x)

The graph of log&lt;sub&gt;10&lt;/sub&gt;(3-x) is as follows:

{{{drawing(400,200,-10,5,-5,2.5,graph(400,200,-10,5,-5,2.5,ln(3-x)),
green(line(3,6,3,-10)) )}}}

Edwin&lt;/pre&gt;</PRE>