For the data set :

X 1 2 4 5 5 6

Y 6.3 5.9 5.5 2.7 1.9 2.2

a) Draw a scatter diagram. Comment on the type of relation that appears to exist between x and y.

b) Given that X=3.82; Sx=2.49; Y=3.78; Sy=1.69; r=-0.83, determine the least square regression line.

c) Graph the least-squares regression line on the scatter diagram drawn in part (a).