Inverse and Direct Variation Word Problems - Examples

Here's the Ideal Gas Law: $$PV=nRT$$ Without figuring out what all these variables mean, let's just look at this as a function.

We keep certain elements constant to explore the relationship between the other elements. (Note that $R$ is always a constant, meaning its value does not change.)

For example, we can keep $n$ and $T$ constant—making $nRT$ constant. (If we already know the values of these 3 elements, we also know the product of them.) This way, we can explore the relationship of $P$ and $V$.