x=38 34 39 45 44 48 61 55 53
y=25 23 28 32 30 30 30 26 28
a. Find the equation of the regression line.
y=_____x+_____
(Round to three decimal places)
b. Construct a scatter plot of the data and draw the regression line. Plot the x-values on the horizontal axis and the y-values on the vertical axis.
c. Construct a residual plot. Plot the x-values on the horizontal axis and the residuals on the vertical axis.
d. The residual plot (shows/does not show) a pattern because the residuals (do/do not fluctuate) about 0. This implies that the regression line (is/is not) a good representation of the relationship between the variables