Answer
It can be concluded that Barbara is not well off because her well-being index score of 67.3 is less than the expected/average score for someone who has a commute time of 20 minutes.
Work Step by Step
$\hat{y} = 69.0296 - 0.0479x$
$\hat{y} = 69.0296 - 0.0479(20)$
$\hat{y} = 68.0716$
$\hat{y} \approx 68.1$
It is expected that a person who spends 20 minutes commuting will have a well-being index score of approximately 68.1.
Thus, it can be concluded that Barbara is not well off because her well-being index score of 67.3 is less than the expected/average score for someone who has a commute time of 20 minutes.
