Hello, I am trying to figure out what test to use in order to solve a fairly basic concept. I am not sure if this is a cenvergence test or a significance test. Example: Consider the following data x y 1 30 2 22 3 18 4 12 5 10 6 9 7 8 8 6 9 5.5 10 5.8 I want to know at what x does the series of data start to become not significantly changing any more. If I simply know what type of test to be using, I think I am capable of solving my problem. Thank you for your help!