2) The data (in thousands of dollars) on expenses in advertising and income of a restaurant are the following: I Advertising expenses Income 19 32 4 64 6 90 105 a) Is there a significant linear relationship between advertising expenses and the revenue received by the restaurant? (use the linear correlation coefficient to prove it). b) If the linear relationship is significant, find the regression equation that allows forecasting the income given the investment in advertising. c) If $10,000 is invested, what revenue should the restaurant receive