# Math Vocabulary

## Parabola

A parabola is a curve where any point is at an equal distance from the focus and the directrix.

An equation where the highest exponent of the variable (usually "x") is a square (2).

It is usually written ax2+bx+c = 0
Example: 2x2+5x-3 = 0

## Vertex

A point where two or more straight lines meet. A corner.

## Axis of Symetry

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 f(x) = ax2 + bx + c where a< 0,="" is="" the="">y- coordinate of the vertex.

• The quadratic function f(x) = 9 - x2 has the maximum value of 9.

## Minimum Value

The minimum value of a quadratic function f(x) = ax2 + bx + c where a > 0, is the y- coordinate of the vertex.

• The quadratic function f(x) = 16 + x2 has the minimum value of 16.

## Terms

In Algebra a term is either:
• a single number, or
• a variable, or
• numbers and variables multiplied together.

## First Differences

Difference means the answer to a subtraction equation. Therefore, the first difference may be the first answer to a dropping-down list (look at picture).

## Second Deferences

The second difference is achieved once the first difference is discovered. It is another step further to a list. Normally, this difference is always the same.
Hopefully these two are somewhat accurate, I could not find the definitions anywhere...

## Zeros (roots)

Where a function equals the value zero (0).

Example: -2 and 2 are the zeros of the function x2 - 4

Also called "root".