The regression model from the previous part is repeated here: to predict the selling price of condominiums and single-family homes in Cambridge from x1 = house size, x2 = a binary predictor for whether a home is a single-family home (x2 = 1 for single-family homes), and the interaction between the two. The estimated regression model is given below: y-hat = 428 + 0.286x1 + 104x2 - 0.140(x1 * x2) What is the estimated line to predict selling price from house size for single-family homes