(a) Construct scatter diagrams of the data sets

(i)

x 0 4 2 6 3 y 4 6 2 8 5

(ii)

x 0 4 2 6 3 y 8 2 5 4 6

(b) Calculate r for the data set (i).

(c) Guess the value of r for the data set (ii)

and then calculate r. (Note: The x and y values are the same for both sets, but they are paired differently in the two cases.)