4. Trend surface analysis is one of the applications of OLS because spatial coordinates X and Y are used as independent variables. In a trend surface analysis of the temperature in Alberta on X and Y coordinates, the analyst regressed temperature on X and Y. The computer output is below. (5pt) ANOVA(b) Sum of Model Squares df Mean Square F Sig Regression 477.500 2 238.750 28.608 1000(a) Residual 175.260 21 8.346 Total 652.760 23 a Predictors: (Constant), y, x b Dependent Variable: z Coefficients(a) Unstandardized Standardized Coefficients Coefficients t Sig. Model B Std. Error Beta B Std. Error 1 (Constant) 13.164 1.556 8.458 X -.120 032 -.439 -3.788 001 V -.259 036 -.836 -7.216 000 a Dependent Variable: z (1) The regression equation is (Be sure to define the variables for your equation) (3pt)