Understanding Interval Notation

[@blossom5]

THIS IS SO HELPFUL!!! THANK YOU FOR CLEARLY EXPLAINING THIS!!! THIS IS A LIFE SAVER!!!

[@maheenfaridi5616]

Explained soo well thank you

[@user-tm27651]

Taking college algebra online over the summer and the examples they give on it are confusing. This helped out so so much. Thank you for all you do!

[@lailafida7554]

Wow superb explanation.

[@lbrame7230]

This is how Math should be taught!! Amazing video! Thank you!!

[@marontomakha4988]

Totally agree

[@andyvizcaino4131]

Agree..i didn’t understand nothing till I saw this video

[@chriscao9828]

Maths is made easy with this kind of teacher in class 👌👌

[@somerandomdude5218]

I didn’t understand any of this until I watched this lol

[@Donquella92]

You are a great teacher. The way you explained made it so much easier. It helped me understand Interval Notation & how to graph it on a number line. Thank you a lot!

[@alainac.8183]

how do you know if a number is included or excluded? i kind of get the gist of it but i want to understand why the the numbers are included or excluded

[@rafifhashesh1615]

if these greater () have a line under, it means it can be equal making it included, looking like this ≤ !!

[@alainac.8183]

@@rafifhashesh1615 Thank you so much!!

[@rafifhashesh1615]

@@alainac.8183 no problem!! happy to help : D

[@playboimo3341]

omg thank you I wasn't paying attention in class and needed this

[@vanessaguerrero5835]

THANK YOU SO MUCH! very good explanation. i have a test in 1hr & 30min & i finally understand this part.

[@AlexisGomintong-xz3lh]

Thankyou 😊😊

[@z.n.t.]

Thank you so much, Mrs. Rabinson. My college instructor recommended that I look these up since I was confused a bit.

[@bradleysmith905]

I might actually pass my Algebra 2 test thanks to you. :)

[@jasonstarrising]

Bradley Smith
...this is Algebra 1

[@maryrobinson317]

@@jasonstarrising I made this for my junior and senior students who were still not understanding how to define domain and range of a graph because they couldn't understand intervals. Some teachers do not teach interval notation at all.

[@rafifhashesh1615]

I am taking my Algebra 2 exam tomorrow! this is VERY helpful, thank you

[@mistressmeowmeow6955]

I was sooo confused about this but you cleared it up right and made it so easy to understand. Thank you

[@vanessachen2330]

Thank you! clear and precise explanation.

[@racheljune688]

Thank you. You just helped me understand my math in college by watching this. :)

[@graig88]

Better instructions then my math teacher.

[@maryrobinson317]

Thanks!

[@brittanyhahnen5262]

Thank you for the simple explanation.

[@HySeXtTh19]

This is explained SO well! You helped me so much! Thank you!

[@RohanKumar-pe2nh]

yes ur correct

[@jonjimenez2524]

thanks for the great explanation for those of us who forgot all of this stuff !

[@ifeomamaduakor775]

Great teacher I can finally finish this homework

[@LimeGamming]

You have saved me! Thankyou so much!

[@maccha9661]

Thank you for giving this video 👍👍

[@harry234]

good vid Mary

[@kassbest9572]

Thank you sooo much professor you helped me so much, than you again

[@maryrobinson317]

Tornado air you’re welcome!

[@aakash185]

thank you so much.......

[@filmtressmu8552]

Thank you, many high-fives and 'fist bumps' to you. Can you come and teach at my school? lol

[@plumberpipefitter5125]

VERY well done

[@obscure884]

Thank you!! You saved me!

[@andyvizcaino4131]

Thank you 🙏🏾 god bless u

[@year3thousandmusic]

you're a life saver, thank you :)

[@WCephei77HD]

Fantastic! Thank you!

[@fitzpatric12]

so glad i found this!!

[@maryrobinson317]

Glad it was helpful!

[@fitzpatric12]

more than helpful!..now i understand it very well!..and it help me on my exam! yes!!.. you are an awesome teacher!

[@wildestdreams6472]

praise from india

[@spacedeer44]

can this lady be my math teacher... my current teacher CANNOT teach lol

[@madscientist1391]

Thnq u very much

[@sbarrera2863]

this helped so much, thank you....!

[@savandhannah1185]

Thank you so much ahaha I get it now

[@troydumas8084]

wonderful!

[@ValentinFamilie]

I still don't understand how do u know when to go left or right

[@maryrobinson317]

If the arrow in the inequality points left, shade left on the number line. If the arrow points right, shade right. I made this video so students could better understand how to write intervals to express domain and range. Since domain are all x's, and the x-axis goes left and right, go left if < and right if >. Since range are all y's, and the y-axis goes up and down, remember that up is positive and down is negative on the y-axis. So if the inequality symbol is pointing left < (think left...low...or below), shade down, below the number. If the inequality symbol is pointing right > (think right...raise...as in raise up) and shade up, above the number.

[@aliciakay6555]

i wish u were my math teacher

[@ahmaribarrineau7817]

You saved me ....

[@jannatulferdousimou1641]

Thanks💘😍

[@Msj2thej]

Thank you!

[@sarfoalfred719]

what about {x|7

[@maryrobinson317]

It's always easiest to understand if the variable is on the left side. So rewrite as x>7

[@cierral1170]

None of my problems look like this but thank you anyway

[@futurecanadian8257]

thanks🙏

[@yahvin86]

nice pen

[@maryrobinson317]

They are my favorite. I get them at the Dollar Tree 2 in a pack. Brand is INC or something like that.

[@arnavjadhav296]

The Southern accents kills me

[@maryrobinson317]

LOL