Question: Movie Ratings. Does the cost of making a movie depend on its audience? Here’s a scatterplot of the same data we examined in Exercise 7. Movies with an R rating are colored purple, those with a PG—13 rating are red, and those with a PG rating are green. Regression lines have been found for each group. (The black points are G-rated, but there were too few to fit a line reliably.)

1. In what ways is the relationship between run times and budgets similar for the three different ratings groups?

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