13 (7 points) The following table lists the ages for a sample of couples on a vacation cruise. X 45 54 y 09 60 49 49 45 45 55 59 49 46 46 64 69 69 57 57 The least-squares regression line is in the form y= bo + bx. Compute the value of b. That is, compute the slope. Round your answer to two decimal places. Write only a number as your