## Parabola

A symmetrical open plane curve formed by the intersection of a cone with a plane parallel to its side. The path of a projectile under the influence of gravity ideally follows a curve of this shape.

Involving the second and no higher power of an unknown quantity or variable.

## Vertex

The highest point; the top or apex.

each angular point of a polygon, polyhedron, or other figure.

• a meeting point of two lines that form an angle.

• the point at which an axis meets a curve or surface.

## Axis of Symmetry

A line through a shape so that each side is a mirror image. If the shape were to be folded in half along the axis of symmetry, then the two halves would be the same, they would match up.

## Maximum Value

The maximum value of a quadratic function.

## Minimum Value

The minimum value of a quadratic function.

## Terms

Each of the quantities in a ratio, series, or mathematical expression.

## First Differences

Example/Definition (below): the difference in y-values for consecutive x-values in a table

## Second Differences

Example/Definition: the difference between the the first differences for example 10-6 above is 4 and so on.

## Zeros (roots)

It is a solution to the polynomial equation, P(x) = 0.
It is that value of x that makes the polynomial equal to 0.