Density is equal to the mass divided by the volume. Usually density is represented by the Greek letter rho, however here I will just use the letter "r". So then:
r = M/V and therefore
M = rV and therefore
V = M/r
So if you know any two of r, M, or V, you can find the missing piece of information.
Formula
A formula.
Formula
Formula
I suspect you are looking for "formula".
By definition, density = mass / volume.
It is a mapping.It need not be a function. For example, f(x) = sqrt(x) where x is a non-negative real number, is a relationship but, because it is one-to-many, it is not a function.
Mass is the weight of an object/liquid/gas. Volume is the amount of space it occupies (although it does not need to completely "fill up" the container it is in, such as a gas that has particles that are not touching side by side like a solid). Density is the relationship between mass and volume. The formula is D=m/v or Density=Mass (divided by) Volume. It determines how solid something is (for example, a gas would not be considered very dense because it's particles are so far apart).
Density is "weight per unit volume" and, among other things, it tells you if something can float.
Formula
Formula
A formula.
e formula
Formula
Formula
I suspect you are looking for "formula".
The answer depends on the quantities and the nature of the relationship. It can be a line-of-best-fit (or regression line), or a formula.