Master How to determine the intervals that a function is increasing, decreasing or constant

Timestamps:
0:00 Intro
1:06 Example #1
2:56 Example #2
3:56 Example #3
4:55 Example #4

Corrections:
1:48 Increasing interval is from negative infinity to negative 5

[vcechaos]

Thank you so much I’m on a crunch for college algebra and I was skeptical because I needed it for porabolas and I saw a bunch of weird shapes but you somehow managed to explain this perfectly THANK YOU.

[sarkoali]

Dear
But dear why critical value include increasing or decreasing ? While critical value in derivative equal zero or undefind ?

[edita]

Very helpful video! Thank you very much!

[AddiVie]

You’re saving my ass. Thank you so much !! 🙏🙏🙏 I hope this is considered civil and respectful.

[jstarks]

Nice video, but you should not be using brackets for any of these intervals. If the graph is increasing from negative infinity to -5, then that interval would be (-inf, -5). The function is NOT increasing at x = -5. It’s changing direction at that point and is therefore part of the interval.

[zeeshan]

Please fix up mistake there u put [ ] on absolute Max's and Min's

[tmwbatman]

First example...
Increasing from ( -inf, -5]. Please fix mistake.

[theplasmatron]

I swear, it's like anytime you need help with something, Brain McLogan is the top math guy on YouTube to help, hahaha.

[craiglevig]

He needs to be careful with idea of OPEN vs CLOSED interval! He has x= -5 in 2 INTERVALS...He should have used ( ), not [ ]