Math Is Fun Forum

nycguitarguy

Member

Registered: 2024-02-24

Posts: 542

Vertical Line Test

Given a graph, how does one determine if it is a function using the vertical line test?

Bob

Administrator

Registered: 2010-06-20

Posts: 10,196

Re: Vertical Line Test

https://www.mathsisfun.com/sets/function.html

It's quite a way down the page.

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

amnkb

Member

Registered: 2023-09-19

Posts: 253

Re: Vertical Line Test

Given a graph, how does one determine if it is a function using the vertical line test?

see if there is anywhere you could draw a vertical line and cross the graph more than 1 time
If yes, then not a fcn

nycguitarguy

Member

Registered: 2024-02-24

Posts: 542

Re: Vertical Line Test

https://www.mathsisfun.com/sets/function.html

It's quite a way down the page.

Bob

Thanks for link. I forgot about the math resources available on this website.