Vertex of a Function (continued)
If we look at the quadratic function f(x) = ax2 + bx + c, to find the vertex of any quadratic (h, k) find the value of and insert this value into the function.
Vertex = (h, k) =
The axis of symmetry goes right through the vertex. The equation for the axis of symmetry is
Example: Finding the Vertex of a Function
Let’s look at an example of how to find the vertex of a function. Select the play button to begin the example, and then use the solve button to view the solution and use the navigation buttons to pause/stop the example. View the presentation as often as you would like, and take notes as you follow along. Be sure to set your volume at a reasonable level before you begin.