A pumpkin farmer wants to create a linear regression model to predict the circumference of a pumpkin (Y-variable) from its weight (X-variable). He samples 40 pumpkins from his pumpkin patch and the mean weight is 14 lbs with a standard deviation of 3 lbs. The mean circumference is 50 inches with a standard deviation of 12 inches. The correlation between pumpkin weight and circumference is r =0.75. Required:
What is the slope of the linear regression model predicting circumference from weight?