Regression Equation
House Price Index = 3.883 + 0.369(consumer price index) + 0.007(real GDP rate) + 0.857(income increment rate)
Real GDP rate is the variable that contributes the highest to the variation of the dependent variable (house price index) because its beta value (under standardized coefficients) for this variable is the largest (0.407) if compared to other variables such as consumer price index and income increment rate. Therefore, real GDP is making the strongest unique contribution to explain the variation of dependent variable (house price index).