Which of the following data sets or plots could have a regression line with a negative y -intercept? Select the correct answer below: The difference in height between two twins (shorter twin - taller twin), plotted as a function of age. The number of people saved from a well, as a function of the number of years since the town was founded. The height of the taller of two twins, as a function of age. The number of people who have fallen into a well, plotted as a function of the number of years since the town was founded