Statnote 19: non-linear regression: fitting an exponential curve to data

Anthony Hilton, Richard A. Armstrong

Research output: Contribution to specialist publication or newspaperArticle


Non-linear relationships are common in microbiological research and often necessitate the use of the statistical techniques of non-linear regression or curve fitting. In some circumstances, the investigator may wish to fit an exponential model to the data, i.e., to test the hypothesis that a quantity Y either increases or decays exponentially with increasing X. This type of model is straight forward to fit as taking logarithms of the Y variable linearises the relationship which can then be treated by the methods of linear regression.
Original languageEnglish
Number of pages2
Specialist publicationMicrobiologist
Publication statusPublished - Dec 2009


  • non-linear relationships
  • microbiological research
  • statistical techniques
  • non-linear regression
  • curve fitting
  • exponential model to the data
  • linear regression


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