## Problem 3: Speed and mileage A study conducted by a department of transportation regarding driving speed and mileage for midsize automobiles resulted in the data: Variable - - - - - - -- - - - X ( speed in mph ) 30 50 | 40 55 | 30 25 |60 25 | 50 | 55 | Y (mileage in mpg) | 28 | 25 | 25 | 23 | 30 | 32 | 21 | 35 | 26 | 25 | a. Find the equation of the least squares line and provide a model summary. (8 points) {r} # Your code here b. Create a new plot labeling the axes and insert the regression line in the scatter diagram of part (a). (6 points) {r} # Your code here