b. What effect would installing 9 inches of insulation instead of 6 have on the monthly natural gas consumption (assuming the outdoor temperature remains at 41 degrees F)? (Round your answers to 2 decimal places.) of cubic feet of monthly natural gas consumption, down to c. Why are the regression coefficients b and b negative? Is this logical? logically, as the amount of insulation cubic feet and outdoor temperature the consumption of natural gas decreases b. What effect would installing 9 inches of insulation instead of 6 have on the monthly natural gas consumption (assuming the outdoor temperature remains at 41 degrees F)? (Round your answers to 2 decimal places.) of cubic feet of monthly natural gas consumption, down to c. Why are the regression coefficients b and b negative? Is this logical? logically, as the amount of insulation cubic feet and outdoor temperature the consumption of natural gas decreases