Builders need to predict the final selling price of a home. For one model using size (x), in square feet, to predict price (y), in U. S. dollars, a slope of 77 was found. Interpret this slope in context. a. If a house costs one more dollar, it is predicted to decrease in size by 77 square feet, on average. b. If a house costs one more dollar, it is predicted to increase in size by 77 square feet, on average. c. If a house increases in size by one square foot, it is predicted to cost $77 less, on average. d. If a house increases in size by one square foot, it is predicted to cost $77 more, on average. e. If a house were to actually be only one square foot in size, it would cost $77, according to this model.