1. In rugby, a "try" is the primary method of scoring, similar to a touchdown in American football. The scatterplot displays the relationship between x = number of line breaks achieved and y = number of tries for the 15 Super Rugby teams in Australia, New Zealand, South Africa, Argentina, and Japan, along with the least-squares regression line.
2. The standard deviation of the residuals for this model is s = 6.83. Interpret this value.
3. Instead of using number of line breaks achieved as the explanatory variable, we can use the number of line breaks allowed to predict the number of tries. The standard deviation of the residuals is s = 9.97 for the least-squares regression line relating y = number of tries to x = number of line breaks allowed. Which variable is a better predictor of points scored, number of line breaks achieved or number of line breaks allowed? Explain your reasoning.