I have two data sets, Fladen A and Fladen B. These are two locations in the North Sea. For each dataset, I have both Age and Height data for a marine mollusk. I have plotted and produced a linear regression line for Age vs height for both datasets.

However, I am not sure what statistical test/R code to use to see if the age height relationship in Fladen A is significantly different to the Age Height relationship in Fladen B.

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I have tried anova tests but I do not think this is correct