What is the Horizontal Line Test?

Learn how to use the Horizontal Line Test to see if the inverse of a graph is a function in this free math video tutorial by Mario's Math Tutoring.

0:03 What Does the Horizontal Line Test?
0:13 Example 1 Checking if the Inverse is a Function
0:52 Example 2
1:07 Example 3
1:26 What Does the Graph of an Inverse Function Look Like

Related Videos:

Vertical Line Test

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[brandonpanuco]

thank you, an online 400 dollar class couldn't explain this as much as you did.

[hopepetrie]

Thanks, Test tomorrow, helped me out a lot and was a short and sweet video.

[brodman_mm]

Thank you, the explanations online weren't helping me understand. You made it much more clear to me

[ervtheperk]

Bruh his helped me in my precalc class thx

[Annie-mkgq]

your video is still helping math students in 2020

[friendlyfire]

I just wish you had shown what the inverses look like. Are they mirror images? Are they twisting the graph 2 notches?

[ykrjanonimaths]

Sir this is not function how could uh explain the horizontal line test

[ej]

so failing the horizontal line test does not mean its not a function?

[Fngiraffe]

God loves you, thankyou for the help, remember to be thankful for what God has given you, and remember that Jesus is coming soon and He loves you so make sure you put your trust in Jesus and repent, because sin cant be in Heaven !!