Identifying Functions in Algebra

To accept only coins

To give a treat based on the button pressed

To display advertisements

To dispense different items randomly

A relationship where each input is paired with exactly one output

A machine that dispenses candy

A set of random numbers

A graph with multiple lines

Input and Output

X and Y

Start and End

Domain and Range

Domain

Data

Diagram

Distance

{(8, 3), (9, 5), (8, 6)}

{(4, 6), (5, 1), (4, 6)}

{(2, 3), (2, 4), (2, 5)}

{(1, 2), (1, 3), (1, 4)}

Because 8 is paired with two different outputs

Because 9 is not an input

Because it has more than three pairs

Because 3 is not an output

No arrows at all

All inputs having the same output

Arrows crossing each other

Multiple arrows coming from a single input

To measure the distance between points

To find the slope of the graph

To determine if a graph represents a function

To check if the graph is straight

The graph is quadratic

The graph is linear

The graph does not represent a function

The graph represents a function

Every y-value has exactly one x-value

The graph must be a straight line

The graph must be a curve

Every x-value has exactly one y-value