**DEFINITIONS
**

**DOMAIN** describes all the *independent* values in a function.

**RANGE** describes all the *dependent* values in a function.

**DISCRETE FUNCTIONS**

Discrete functions are derived from sets of data which have gaps in them. As such they are described by sets of ordered pairs (*x*,
*y*).

The domain and range of these functions are described in brackets with each individual value listed.

i.e. Function *f(x)* is represented by the values { (0,2) (1,4) (2,3) (4,6) }

The domain for *f(x)* is: { 0, 1, 2, 4}

The range for *f(x)* is: {2, 4, 3, 6}

*NOTE: The order in which the domain and range are listed must match so that when the elements are listed they match the original set. You cannot write the range as { 2, 3, 4, 6} even though they would then be in increasing order.*