# How do you find the end behavior of a quadratic function?

##### 1 Answer

Quadratic functions have graphs called parabolas.

The first graph of y =

Compare this behavior to that of the second graph, f(x) =

Both ends of this function point downward to negative infinity. The lead coefficient is negative this time.

Now, whenever you see a quadratic function with lead coefficient positive, you can predict its end behavior as both ends up. You can write: as

as

Last example:

Its end behavior:

as

(right end down, left end down)