There is a direct proportion between two values when one is a multiple of the other. For example, \(1\text{cm} = 10\text{mm}.\) To convert \(\text{cm}\) to \(\text{mm}\), the multiplier is always 10.

Direct variation is a mathematical concept that involves two variables that are proportional to each other. In other words, when one of the variables increases, the other variable also increases by a ...