a realtor is trying to predict the selling price of houses in greenville (in thousands of dollars) as a function of size (measured in thousands of square feet) and whether or not there is a fireplace (fp is 0 if there is no fireplace, 1 if there is a fireplace). part of the regression output is provided below, based on a sample of 20 homes. some of the information has been omitted. which statement is supported by the regression output?