First of all, I understand what a constant is, what a variable is, and somewhat what a Parameter is. For parameters, as much as I know they are variables but of a specific type, for exmaple:- a^2= B, where B is the area of the square..now "a" is a variable, but its also a parameter, since its of certain type... I doubt I`m right, but that`s how a parameter is pictured in my mind, and I hope you correct it if its wrong. For arguments, I totally don`t know what they are about; well, I read about them, but that turned out to be logic, and unrelated to the original topic (parameters, and parametric equations) Since its hard to quote from a website, please visit: http://en.wikipedia.org/wiki/Parameter and from the index you can go to:- * 2.1 Mathematical functions * 2.2 Analytic geometry concerning * 2.1: what are arguments? they seem to be everything that can be put in the function`s notation (like shown in the example: f(x1,x2,x3,x4...; a1,a2,a3,a4...) BUT: Now this is confusing! (If you can please clarify this to me?) and as a result, and anyway.. I don`t get the whole thing! what are parameters? how are they different than variables? and what are arguments? Now what I`m most concerned with is "parametric equations", so if this sentence means that I should skip all what I mentioned please tell me. (I`m totally confused and can`t judge right now) What tells me that I shouldn't skip what I mentioned is that I`ve read the following - while I was reading on parametric equations, here is what I read: I don`t think this simply means "independent variables"!?