Below are four bivariate data sets and the scatter plot for each. (Note that each scatter plot is displayed on the same scale.) Each data set is made up of sample values drawn from a population.

\f1. In which data set is there evidence of a strong nonlinear relationship between the two variables? Choose one 2. Which data set indicates the strongest negative linear relationship between its two variables? Choose one 3. Which data set has an apparent negative, but not perfect, linear relationship between its two variables? Choose one 4. Which data set indicates a perfect positive linear relationship between its two variables? Choose one