However, you will occasionally see R 2 values above 0.8 or even 0.9. This may be unlikely to occur, but it is not impossible. If you add more data points to the columns, you will see that the R 2 values will be lower, and that high values for R 2 are less likely to occur. If you analyze a pair of variables with only a few data points, don't assume that a high value for R 2 means that the variables are correlated. It could just be dumb luck.
Rabbits See rabbits.xls for several different growth models.
Linear The number of rabbits born in each generation is constant. The linear model is probably too simple. You would expect the number of rabits born to depend on the population, so we use a birth rate . The number of rabbits born in a generation is now the birth rate multiplied by the current population. When the population is higher, more rabbits will be born.