For this exercise, we will look at a dataset from Time Magazine about college rankings. In this dataset, each row (statistical unit) is a college. There are ????=706 rows. After some simplifying, the variables included in the dataset are: school: the name of the school earn: yearly earnings sat: average SAT score act: average ACT score price: the cost of attendance for four years. (a) Create the SLR Model. (5 points) Let's start simple, and model this relationship between earn (the response) and sat (the predictor). Save this model into the slr_earn variable.