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/rcode to use to see if the age height relationship in Fladen A is significantly different to the Age Height relationship in Fladen B [enter image description here][1] I have tried anova tests but I do not think this is correct