### vertex

The turning point which is the change from an increasing to decreasing interval or vice-versa. It is a point so it is written as a coordinate pair (x,y). If the point is at the bottom of the function, it is called a **minimum**. If the point is at the top of the function, it is called a **maximum.**

For quadratics: If a quadratic is written in standard form, rewriting it in vertex form will provide the coordinates for the vertex.

Once it's written in vertex form, the number in with the x is the x coordinate of the vertex BUT OPPOSITE SIGN. The number outside the parentheses is the y coordinate just the way it is. The vertex is ( -3,-14).

back to top