# math vocab

## parabola

A special curve, shaped like an arch.

## Quadratic

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 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 largest value on the parabola

## Minimum value

The smallest value on the parabola

## term

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

## first differences

When the x-differences are all constant, then the y-differences (or first differences) are useful in telling if a set of data is nearly linear or not.

## second differences

For a sequence defined by a quadratic formula, the second differences will be constant and equal to twice the number of n2 .

## zeros(roots)

Where a function equals the value zero (0).

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