2.65 Blueberries and anthocyanins. In Exercise 2.18 (page 97), you examined the relationship between Antho4 and Antho3, two anthocyanins found in blueberries. In Exercise 2.42 (page 105), you found the correlation between these two variables.

1. (a) Find the equation of the least-squares regression line for predicting Antho4 from Antho3.

2. (b) Make a scatterplot of the data with the fitted line.

3. (c) How well does the line fit the data? Explain your answer.

4. (d) Use the line to predict the value of Antho4 when Antho3 is equal to 1.5.