Answer
$ŷ =1.390x+1.11$
Work Step by Step
In MINITAB, enter the right humerus in C1 and in C2 enter the right tibia values.
Select Stats -> Regression -> Regression -> Fit Regression Model
Enter C2 in "Responses" and C1 in "Continuous Predictors"
The least-squares regression line ($ŷ =b_1x+b_0$) wil be shown in "Regression Equation", where C2 is $ŷ$ (right tibia) and C1 is $x$ (right humerus)