Height does not affect the constant of proportionality, denoted as 'k', in the context of drag and air resistance. While there is a discussion about Hooke's law and its application to springs, the focus shifts to falling objects where 'k' relates to drag. The acceleration due to gravity, approximated as 9.8 m/s², remains constant for most practical scenarios, despite slight variations at different heights. Participants clarify that if 'k' is provided as a constant in a problem, it should be treated as such without concern for changes. Overall, the consensus is that 'k' remains constant in the context discussed.