Answer
$ŷ=25.6+0.0719x_1-0.8x_2+55.3x_3$
Work Step by Step
In MINITAB, ent\sqrt xer the Square Footage values in C1, the Bedrooms values in C2, the Baths values in C3 and the Asking Price values in C4.
Select Stats -> Regression -> Regression -> Fit Regression Model
Enter C4 in "Responses" and C1 C2 C3 in "Continuous Predictors"
The least-squares regression line will be shown in "Regression Equation", where C4 is $ŷ$ (Asking Price), C1 is $x_1$ (Square Footage), C2 is $x_2$ (Bedrooms) and C3 is $x_3$ (Baths).
$ŷ=25.6+0.0719x_1-0.8x_2+55.3x_3$
