Question: Use a scatterplot and the linear correlation coefficient rr to determine whether there is a correlation between the two variables. (Note: Use software, and don't forget to look at the scatterplot!)

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a) r=

b) There is A. a perfect positive correlation between xx and yy B. a nonlinear correlation between xx and yy C. a positive correlation between xx and yy D. a perfect negative correlation between xx and yy E. a negative correlation between xx and yy F. no correlation between xx and yy

(1 point) Use a scatterplot and the linear correlation coefficient r to determine whether there is a correlation between the two variables. (Note: Use software, and don't forget to look at the scatterplot!) x 0.5 1.6 2.1 3.3 4.3 5.4 6.5 7.1 8.1 9.2 10.5 11.4 12.2 13.6 14.4 y 156 12.3 14.7 11.8 12.5 7.7 10.4 9.1 8.9 3.8 3.6 1.7 4.5 0.4 2.3 a) r = 0.4692384 b) There is A. a perfect positive correlation between x and y B. a nonlinear correlation between x and y ' C. a positive correlation between x and y o D. a perfect negative correlation between x and y E. a negative correlation between x and y F. no correlation between x and y