A study of the amount of rainfall and the quantity of air pollution removed produced the

following data:

a) Find the equation of the regression line to predict the particulate removed from the

amount of daily rainfall.

b) Estimate the amount of particulate removed when the daily rainfall is x = 4.8 units.

c) Find the estimated quadratic regression model for the above given data.

d) Find the linear correlation co-efficient "r" and comment on the result.

e) Calculate rank correlation co-efficient for the above given data.