Answer:
Variation problems aren't hard once you get the hang of the lingo. The only real difficulty is learning the somewhat specialized vocabulary and the techniques for this classification of problems.
Variation problems involve fairly simple relationships or formulas, involving one variable being equal to one term. That term might be linear (something with just an "x"), quadratic (something in "x2"), more than one variable (such as "r2 h"), a square root (something like "\sqrt{4 - r^2\,}
4−r
2
"), or something else.
But there is always just the one term in the formula; this term will be multiplied by some number and, if you don't yet know what that number is, the number is usually denoted by "k". This number k is called "the constant of variation".
