Marathon organizers are studying data from the Boston Marathon. Their goal is to predict the time taken to run the first 10km (Y), from the time taken to run the first 5k (X). They obtain the least squares equation below: y = 2x + 0.14. One runner in this dataset took 30.2 minutes to run the first 5km and 55.1 minutes to run the first 10km. Calculate the residual for this observation. Give your answer to two decimal places Answer: |x=Ay-C