The correct response is:
The constant of proportionality is 7. It takes the crew of workers 7 weeks to complete 1 road project.
In this context, the constant of proportionality (7) means that for each road project (x), it takes the crew of workers 7 weeks (y) to complete that project. Therefore, if there are multiple projects, the total time will increase proportionately based on the number of projects, with each additional project taking an additional 7 weeks.