9. A small independent organic food store offers a variety of specialty coffees. To determine whether price has an impact on sales, the managers kept track of how many pounds of each variety of coffee were sold last month. Based on the data and summary statistics given below, what is the slope of the estimated regression line that relates the response variable (monthly sales) to the predictor variable (price per pound)? Price per pound Monthly sales Mean $ 8.75 $ 54.5 Standard Deviation 3.5 17.25 Correlation -0.92 A. 4.53 B. -4.53 C. -5.13 D. 94.18 E. 45.75