most recent 30 from http://mathoverflow.net 2013-05-21T21:43:12Z http://mathoverflow.net/feeds/question/105608 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/105608/finding-a-logarithmic-function-from-a-graph unknown (google) 2012-08-27T07:17:56Z 2012-08-27T08:45:42Z

<p>I don't know how to find the logarithmic function from this graph. Based on looking at the points they seem to be (-1,1) and (-3,2) with a vertical asymptote of 1. (x=1)</p> <p>However when I try using the equation of f(x)= alog(-<em>x</em>-1)+k, I keep getting a negative value of x inside the log which obviously doesn't compute when I substitute one of the points of the graph.</p> <p><a href="http://i.imgur.com/Z9JCv.png" rel="nofollow">http://i.imgur.com/Z9JCv.png</a></p>