Wetzel

Math 101

6.7 – Quadratic Functions

Review of a Function –

Ex.:  Evaluate.

1.)                                       2.) 

3.)  Let .  Find all values x for which

Graph of a Quadratic Function –

Ex.:

4.)  A football is kicked up with an initial velocity of 64 feet/second.  The football’s height above the ground, in feet, after t seconds is given by the function .

            a.)  Use the function to determine how high above the ground the football is after one second.

            b.)  How long will it take the football to land on the ground?