The amounts of 6 restaurant bills and the corresponding amounts of the tips are given in the below. Assume that bill amount is the explanatory variable and tip amount the response variable. Bill 52.44 32.98 64.30 106.27 70.29 49.72 Tip 7.00 4.50 7.70 16.00 10.00 5.28 (a) Find the correlation: r : (b) Does there appearto be a significant correlation? O A. Yes 0 B. No (c) The regression equation is Q = ..: (d) If the amount of the bill is $90, the best prediction for the amount of the tip is $ 5.5 Note: Enter your answer as a number xx.xx (e) According to the regression equation, for every $10 increase in the bill, the tip should : (Enter INCREASE or DECREASE) by $