Explain how you would identify a function using each of the following displays, and then turn on “Show function test” in each display to check your answers:
a mapping diagram

a set of ordered pairs

a graph

Question

Explain how you would identify a function using each of the following displays, and then turn on “Show function test” in each display to check your answers: 
a mapping diagram
 
a set of ordered pairs
 
 

a graph

jim766 · Answer

on a mapping diagram, it is a function if there are only 1 line going from ea element in the domain, x's

A graph will pass the vertical line test. 
when passing a vertical line  ( up and down) across the graph, if it is a function, you will only pass one point at a time,