Karr and Coats studied the effects of several chemicals on the growth of the German cockroach the following table gives their data for the percent of the chemical a terpineol in the diet of 20 a terpineol Percent a terpineol 1 10 25 Days to Adult Stage 129 113 115 A On the basis of the data given in the table find the best fitting logarithmic function using least squares State the square of the correlation coefficient Use 4 decimal places in your answer y x B Use this model to estimate the days to adult stage with a diet of 20 a terpineol Round to the nearest day When a 20 a terpineol then there are days to adult stage