Answer:
This is not a proportional relationship.
Explanation:
A proportional relationship is that one that connects two variables by a constant of proportionality.
This type of relationships can be written as:
X = k*Y
where X and Y are the variables, and k is constant of proportionality.
In our relationship, F=9/5c+32, we can see that we have another term, a 32, so this relation can not be a proportional relationship.