title: Inverse Function Algorithm Excel
body: <p>I am trying to create a dot gain compensation curve in excel. In excel I have 3 columns of data Column 1 = patch ID (1%-100%) Column 2 = Desired Value, and Colum 3 = Measured Value.</p>
  
  <p>I am looking for some math similar to page 2 figure 2 in the below link
  <a href="http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.1028.9205&amp;rep=rep1&amp;type=pdf" rel="nofollow noreferrer">Click Here</a> </p>
  
  <p>I was thinking about using minverse but not really sure how to make it work. Any help you could provide would be appreciated.</p>