[Stata Program] input bacteria time 355 01 211 02 197 03 166 04 142 05 106 06 104 07 060 08 056 09 038 10 036 11 032 12 021 13 019 14 015 15 end plot bacteria time generate lnbac = log(bacteria) plot lnbac time [Stata Output] plot bacteria time 355 + | * | | | | b | a | c | t | e | * * r | i | * a | * | | * | * | | * * | * * 15 + * * * * +----------------------------------------------------------------+ 1 time 15 generate lnbac=log(bacteria) plot lnbac time 5.87212 + | * | | | | * * | * | * l | n | * * b | a | c | * | * | | * * | * | | * | * 2.70805 + * +----------------------------------------------------------------+ 1 time 15