To find the constant of proportionality in the relationship between the number of cellists and the number of violinists, we can use the information given.
You mentioned that there is 1 cellist for every 8 violinists. This means that for every cellist, there are 8 violinists.
We can express this relationship mathematically. If we denote the number of cellists by \( C \) and the number of violinists by \( V \), we can write:
\[ V = 8C \]
This shows that the number of violinists \( V \) is directly proportional to the number of cellists \( C \), with a constant of proportionality of 8.
Therefore, the constant of proportionality in this relationship is 8, not 40.