1. Warm Up
A 2010 study looked for an association between median SAT scores and 6 year graduation rates at 10 colleges. College SAT Grad rate College SAT Grad rate ) Find the equation of the LSRL and the value of r. 2) Interpret the slope in context. 3) Predict the graduation rate for a school with median SAT of 1100.

2. Guess the Graduation Rate
College SAT Grad rate College SAT Grad rate For SAT: Mean = 1021 Std Dev = 77.8 For Grad Rate: Mean = Std Dev = ) If a college is chosen at random, what would you predict its grad rate to be? How far off from the correct value would you expect to be? 2) If a college is chosen at random and you are told the SAT score is 1100, predict the grad rate and error again.

3. Practice
A method to estimate the age of a lobster was investigated in a 2007 study. The length of the exterior shell was compared to the known age of 10 lobsters. The data is below.
Lobster Length Age Lobster Length Age
1) Find the equation of the LSRL and r.
2) Find r2 and interpret its meaning.