Q3) The following example tabulates the relations between trunk diameter and tree height: 12 Trunk diameter (x) 8 9 7 6 13 7 11 9 tree height (y) 35 49 30 24 60 27 45 51 45 1) Calculate the regression line of y on x. 2) Use the regression line to estimate the height of tree which Trunk diameter is 12 cm.