We are given equation V = r²h.
Let us break it into parts to get the correct variation.
V = r²h could be written first V= r² × h.
And we could break it in two different proportions:
V ∝ r² can be read as V is directly proportional to r².
V ∝ h can be read as V is directly proportional to h .
Non of the variable r² or h in denominator.
When we have any variable in denominator, it's an inverse variation and if we don't have any variable in denominator, it would be a direct variation.
Therefore, we can say V = r²h is a direct variation.
