Lesson Objectives

Review of relation and function
• Review of function and relation as a set of ordered pair
• Review of function and relation as a table of values
• Review of function as a graph
• Review: Vertical line test
• Functions as representations of real-life situation
• Piecewise functions

A relation is a rule that relates values from a set of values (called the domain) to a second set of values (called the range).

The elements of the domain can be imagined as input to a machine that applies a rule to these inputs to generate one or more outputs

A relation is also a set of ordered pairs (x,y).

RELATION

A function is a relation where each element in the domain is related to only one value in the range by some rule.

The elements of the domain can be imagined as input to a machine that applies a rule so that so that each input corresponds to only one output.

A function is a set of ordered pairs (x, y) such that no two ordered pairs have the same x- value but different y-values.

function