I End Behaviour: An important characteristic of a function is its end behaviour. i.e., what happens to the function for extreme values of xi: negative innity no or positive innity cc )] As 3: takes on a very large positive value we say \"(131: > +00\" and as x takes on a very large negative value we say as x )-09. In this example: asx )+oo , the value of f(x) gets larger in the negative direction. We say mm )00 , the value of f(x) gets larger in the positive direction. We say