Answer
$ŷ=16.38+1.016x_1$
Work Step by Step
Let's remove the weight (see the previous item).
In MINITAB, enter the Height values in C1 and the Head Circumference values in C3.
Select Stats -> Regression -> Regression -> Fit Regression Model
Enter C3 in "Responses" and C1 in "Continuous Predictors"
The least-squares regression line will be shown in "Regression Equation", where C3 is $ŷ$ (Head Circumference) and C1 is $x_1$ (Height).
$ŷ=16.38+1.016x_1$
