Fit the model to the data using the method of least squares. Let x1 be the latitudes, x2 be the longitudes, and x3 be the depths. Round the answer to the nearest hundredth. What is the equation for hat(y)?
A) hat(y) = x1 + x2 + x3
B) hat(y) = x1 + 1
C) hat(y) = x1 + x2
D) hat(y) = x1 + x2 + 1