a way to decide if a relation is a function; if a vertical line passes through more than one point of the graph, then the graph is not a function

a way to write a function rule with f(x) instead of y

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U3L1: Functions

Relations and Function

Term	Definition
relation	a pairing of numbers in on set
domain	x values
range	y values
vertical line test	a way to decide if a relation is a function; if a vertical line passes through more than one point of the graph, then the graph is not a function
function notation	a way to write a function rule with f(x) instead of y