4H 1

Below are four bivariate data sets and their scatter plots. (Note that all of the scatter plots are displayed with the same scale.) Each data set is made up of sample values drawn from a population.

\fa ) Which data set indicates a perfect positive linear relationship between its two variables?W I 11r m 11 1.0 7.8 10 1.0 6.6 1-3 2.0 7.1 : x x 2.0 9.3 i 3.0 7.8 :_ x x 3.0 3.4 7 4.0 5.9 6 x 4.0 9.1 6 5.0 6.7 i: x x x 5.0 4.9 : 6_O 4.4 3__ X x 6.0 2.0 3 7.0 4.9 7.0 6.0 ? 8.0 3.4 1" w 8.0 10.2 9.0 4.6 3' : 2 3 4 5 6 8 9 1-3 :1 9.0 5.0 0 10.0 3.2 Figure3 10.0 7.8 Figure4 Answer the following questions. The same response may be the correct answer For more than one question. (b) Which data set has an apparent positive, but net perfect, linear relationship between its two variables? (c) In which data set is there evidence of a strong nonlinear relationship between the two variables?(d) Which data set indicates the strangest negative linear relationship between its two variables