3.10 A set of bivariate data consists of these measurements on two variables, x and y: (3,6) (5,8) (2,6) (1, 4) (4,7) (4,6)

a. Draw a scatterplot to describe the data.

b. Does there appear to be a relationship between x and y? If so, how do you describe it?

c. Calculate the correlation coefficient, r, using the computing formula given in this section.

d. Find the best-fitting line using the computing for- mulas. Graph the line on the scatterplot from part

a. Does the line pass through the middle of the points?