### Empty Set

A set containing no elements.

### Relation

The relationship between two sets.

### Domain

The set of all possible inputs for which the function is defined.

### Range

The set of all possible output values of the function.

### Function

A relation between sets of input and output where each input is related to one and only one output. The

lobster model of mathematics.

### Graph

A diagram representing data or relationship(s) between variables.

### Ordered Pair

Two numbers written in a certain order; (

*a*,

*b*) is different from (

*b*,

*a*).

### Independent Variable

A variable that assume values freely, or independently, in a function.

### Intercept

The point where the graph of a function crosses the

*x*-axis or

*y*-axis.

### Slope

The measure of a line's steepness.

### Polynomial

An algebraic expression constructed from variables and constants, using addition, subtraction, multiplication, and positive integer exponents.

### Quadratic Equation

An equation obtained by setting a quadratic polynomial to 0.

### Quadratic Polynomial

A polynomial of degree 2.

### Exponential Function

A constant raised to a variable represented by

*f*(

*x*) =

*a*^{x}.

### Inequality

A mathematical statement using the symbols <, >, ≤, ≥.