Answer
$β_0=67.39$
$β_1=-0.263$
Work Step by Step
In MINITAB, enter the Age values in C1 and in C2 enter the Grip Strength values.
Select Stats -> Regression -> Regression -> Fit Regression Model
Enter C2 in "Responses" and C1 in "Continuous Predictors"
The least-squares regression line ($ŷ =b_1x+b_0$) will be shown in "Regression Equation", where C2 is ŷ (Grip Strength) and C1 is x (Age)
$ŷ =-0.263x+67.39$
That is:
$b_0=67.39$ and $b_1=-0.263$
$b_0$ is the estimate for $β_0$ and $b_1$ is the estimate for $β_1$.