Functions and Non-Function

Does the mapping of these points represent a function?

• Function

• Not a Function

Which of the following is not a Function?

• (4,2) ; ( -3, 8) ; (5, 1) ; (-3, 8)

• (9, 1) ; (2, 1) ; (5, 1) ; (8, 1)

• ( -2, 4) ; ( -9, -3) ; (-5, -2) ; (-10, -1)

• (6, 8) ; ( 8, 10) ; (-8, 4) ; (6, -8)

Is this table a function or not a function? 

• Function

• Not a Function 

Is this table a function or not a function? 

• Function

• Not a Function

What is the definition of function?

• Has inputs and outputs

• Every input has only ONE output

• Inputs have different outputs every time

• x-values and y-values

Is this table a function or not a function? 

• Function

• Not a Function

Is this graph a function or not a function? 

• Function 

• Not a Function

How do you determine if a relation is a function? 

• The vertical line test crosses more than one point on the graph.

• The same y-values are mapped from the same x-values.

• The vertical line test crosses only one point on the graph.

• Each input is related to more than one output.

Which graph is NOT a function?

• Graph 1

• Graph 2

• Graph 3

• Graph 4

Is this set of ordered pairs a function or not a function? 

• Function

• Not a Function