23. (06.06 MC) Eighteen pairs of measurements were taken at random to estimate the relation between variables X and Y. A least-squares line was fitted to the collected data. The resulting residual plot is shown. 1,000 500 Residuals 0 50 100 *150 200 250 -500 -1,000 X Which of the following conclusions is appropriate? (3 points) The assumption of the Law of Averages has been violated. The variables X and Y are not related at all. A line is an appropriate model to describe the relation between X and Y. O A line is not an appropriate model to describe the relation between X. and Y. O There is not enough information about the variables X and Y to form a conclusion