13. The data show chest size and weight of several bears. Find the regression equation, letting the first variable be the independent (x) variable. Then find the predicted weight of a bear with a chest size of 50 inches. Use a significance level of 0.05. Chest size (inches) 49 51 53 61 57 45 Weight (pounds) 368 382 420 481 457 287 What is the regression equation? y = ____ + _____x. Round to two decimal places as needed. What is the best predicted value? ______pounds. Round to one decimal place as needed.