MATH530_Exam3.xls, which is attached to this question as the hint, include the monthly sales totals from a random sample of 38 stores in a nation-wide chain of sporting goods stores. All stores in the chain are approximately the same size and carry essentially the same merchandise. Information-as described in the comments in each column-is also provided in this dataset regarding the customer base for each of the 38 stores in the sample. Use these data to answer questions 14 through 18. Assuming a linear relationship exists, formulate a simple linear regression model that estimates the relationship between monthly sales (Y) and median family income (X). Or = 39.17 + 299876.81(X) Oy= 299876.81 + 39.17(X) y = 785476.90 + 43.96(X) y = 14.07 + 278756.44(X)