Answer:
60y
where y is the number of houses each volunteer can build
Step-by-step explanation:
I'll assume this is a complete question and i'll try to solve it the best way i can mathematically.
Let us assume that one volunteer can build a certain number of houses, say y houses.
Also, it is stated that the amount of houses that can be built varies directly as the with the number of volunteers. Therefore, it will be mathematically logical to say that if 1 volunteer can build y number of houses, then 60 volunteers will build 60y houses
