Age in Months Height in centimetres Age in Months Height in centimetres 18 76.1 24 79.9 19 77.0 25 81.1 20 78.1 26 81.2 21 78.2 27 81.8 22 78.8 28 82.8 23 79.7 29 83.5 a) Construct a scatterplot for the data and describe the association between age and height in the study. b) Calculate the correlation coefficient "r". Does this value support your description in part (a). c) Find the equation of the least squares regression line. d) What does our regression line predict for the height of children in Kalama at 32 months of age? e) What does our regression line predict for the height of children in Kalama at 20 years of age (20 years = 20X12=240 months)? f) Comment on the validity or usefulness of the predictions in (d) and (e)