A value that is substituted for the independent variable (x) in a relation or function.
The value that results from the substitution of a given input into an expression or function.
An input-output relationship that has exactly one output for each input.
The set of x-coordinates of the set of points on a graph; the set of x-coordinates of a given set of ordered pairs. The value that is the input in a function or relation.
The y-coordinates of the set of points on a graph. Also, the y-coordinates of a given set of ordered pairs. The range is the output in a function or a relation.
A mapping or pairing of input values with output values.
(X axis) The variable (input) that determines the dependent variable (output).
(Y Axis) The variable (output) that is determined by the independent variable (input).
Vertical Line Test
If you place a vertical line on a graph, you can tell whether it is a function. If the line intersects the graph at only one point, then the relationship is a function.
A set of input values that consists of only certain numbers in an interval. On a graph, do not draw a line connecting points.
A set of input values that consists of all numbers in an interval. On a graph, you could draw a line connecting points.