Firstly, the word rational...is derived from ratio..which in simple terms ..is a fraction. a rational function, like all functions, must contain both an independent and dependent variable. The general form of a function is y = f(x), where y [the dependent variable] is based on the value of x [ the independent variable. So, to answer the question, a rational function, is one that involves a rational expression, such as y = 23x/2.
She has enough but too much, if she uses 214 plus the 1 cup she borrowed out of 412 cups of oats for a recipe that calls for 212 then she'll have 413 or 3 cups left separately, she won't need any more
