A random sample of records of electricity usage of homes in the month of July gives the amount of electricity used and size (in square feet) of 135 homes. A regression was done to predict the amount of electricity used (in kilowatt-hours) (y) from size (x). The residuals plot indicated that a linear model is appropriate. The model is y = 0.2x+1271. How much electricity would you predict would be used in a house that is 2471 square feet?