Algebra I Help: Slopes of Parallel and Perpendicular Lines
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- เผยแพร่เมื่อ 11 ก.ย. 2024
- www.greenemath....
In this video, we explain how to determine if a pair of lines is parallel, perpendicular or neither. Parallel lines have the same slope. Perpendicular lines have slopes whose product is (-1) negative one.
Okay, SERIOUSLY cannot thank you enough! The way you explained it really clicked. From what I can tell, it clicked for almost everyone that came here. Thank you so much! Sending love.
Glad it helped!
i have a test tomorrow & this was a life saver. thanks.
I have a test in an hour. Lol. Thank-youu
llisa_s I have to take the math test today because of the end of the year testing
You are very welcome! :)
@@Ccsclosetz so do I
I have a test in 5 minutes haven’t studied for 1 month wish me luck🤞
U already know ur teachers bad when ur watching videos on this kind of stuff lol
either that or the students are so bad they couldn't learn it in the classroom
Dank Meme YES
If the students are so bad why would they be getting help?
OH YEAH YEAH
Or ur a fuck like me who doesn’t pay attention
Before this I couldn’t even spell Parallel
Irvineblue facts 😭😭
I have to Google it also :)
To find out if it is perpendicular you just need to see if the fractions are similar....
So for example -3/4 is perpendicular to 4/3
To find the perpendicular line 'just turn the fraction around and change the signs'
Hope it helps :) It actually saves a tonne of time in the exam.........
Is pararell*
@@dayannagarcia5305 perpendicular
@@dayannagarcia5305 nah perpendicular bro. Parallels have the exact same slope. If they didn’t they would cross over and not be parallel
If you solve for y and put it in slope-intercept form. From standard form, it won't quite work out that way.
For what you're probably looking at now, the answer is yes. Two perpendicular lines (with neither being vertical) will always have slopes such that the product is -1. Later on, you'll deal with the geometric definition of perpendicular, as it applies to having a horizontal line, and a vertical line. When you have two lines such as x = k and y = b, they will be perpendicular, but it takes the understanding of limits to show that the product of their slopes is -1.
I learned more here than I did in a whole half term
Great to hear, good luck with your studies :)
@@Greenemath Thanks
My teacher has been teaching my class this for a week, and he's not so informative and I sit in the back. One video (this) is better then a week of him teaching. Good video and thanks.
I'm so glad it was helpful! :)
I cannot thank you people enough. This is saving me so much through my basic algebra class.
You are welcome, let me know if you have questions.
Good Luck Everyone!
@Britney Lawson We started with 7y = -3x + 4.
We are solving for y in order to put the equation in slope-intercept form: y = mx + b, since the coefficient of x is then the slope.
7y / 7 = -3x / 7 + 4 / 7
Basically we divided everything by 7 so that y could be by itself.
y = (-3/7)x + 4/7
So the 4 isn't eliminated, we are just dividing by 7 since we are doing that to everything. Hope this helps.
Would it work if it’s just x
@@araceliramirezvasquez4773 Would what work? Also you need to leave a new comment so we can get the notifications. Drop your example as a new comment and I'll show you how to solve it.
Legend has it he is still helping kids pass math especially during the pandemic school time
😎
Thank you for giving us opportunity to prepare for midterm and final exams! Well done video! Respect from Asian country!
Awesome! :)
2020, the vid is still helpful
Math doesn't change, only the date does :)
@PWAGEDUDE You are so welcome!
This is amazing. I used it to get an extra six points on my quiz! Our class got to bring it home for homework. THANK YOU!!!!!! This cleared up so much! This is amazing!!!
Perfect, I'm glad it was helpful! :)
@amaka38 Thanks for watching, I really appreciate it!
Thank you! I was very confused learning this in my college algebra class.
Kaii Bizzle I’m learning in 7th grade
Kilzer ! Yea I’m doing this in 8th gadw
Emma Gottberg same
You are very welcome! :)
Thank you so much for this video it helped me a lot with my summer packet because I didn’t know how to do it because our math teacher is our PE teacher literally
You are very welcome! :)
That's awesome, keep up the good work : 0
You're welcome!
tks great teacher great help !!!
Perfect, so glad to hear that! :)
Does this also work for geometry? I'm on the topic called "Slopes of Parallel and Perpendicular" and I wanted to know if it's the same thing as the algebra one on the video. Is it?
i became confuse with that too but they are different my mean the formula is different.
haf mah Thanks! Even though I figured it out already, I was very confused back then...
Sameee
Day-chan lmao 4 years late but will it still give me the right answer
I'm actually need too know ALL of the parallel and perpendicular lines
Thnx bro you really helped me !!
THNX ALOT BRO !!!!!!!!!!
So glad to hear that! :)
Thank You Sir For U R Very Very Detailed Explanation For Understanding Students Make Such Videos Like This And Don't Forget We Always With You 👏🏼👏🏼👏🏼🤝🏻🤝🏻🤝🏼🤝🏼🤝🏼😁😁😁
Glad it was helpful! Good luck with class!
How did i still fail??
Lmao same 😤
Just keep working, everyone falls off sometimes.
Thanks, I have a geometry exam tomorrow and you saved me
Best of luck!
same
@@IamDeskii Good luck to you as well! I hope you all pass your test!
3x + 7y = 4
When you took -3x from both sides, why did the RHS (or 4) end up as: -3x + 4?
Shouldn't it be: -1x?
You didn't explain that part...
Why would it be 1x? I have 4 on the right hand side. If I subtract away -3x, then I just have -3x + 4, or 4 - 3x. There's nothing over there to combine like terms with. The 4 is a constant, there is no x in that term.
Pls.try to understand you can add or subtract similar quantities.-3× is quite different from 4, as one involves 'x' and the other is a constant.
best video ever,,,,,thank you
You are very welcome! :)
Thanks man. Got a 100 on my unit test.
I'm so glad to hear that! :)
If you’re wondering why u subtract x both sides bc u need to turn it into y=mx+b
^ ^
| |
Slope y-intercept
Yes, thank you for making that clear :)
Thank you so much GreeneMath.com ! :)
You are very welcome! :)
Thank you so much I can’t even express in words I love u keep making math vedios🙏❤️📚
You are very welcome! :)
thanks got a 100 on my quiz
Awesome! :)
Thank u a lot. U help my final exam.
Most welcome 😊
you're a goddess sent from above
Aww, thanks for the kind words! :)
Does it always have to equal -1 to be perp
Yes the product of the two slopes needs to be equal to -1.
thx man this was helpful
Glad it helped
thank you now im understanding it more
I'm so glad to hear that! :)
Very good video.
Thanks so much
Thank you too
perpendicular if its the negative resiprocal of the slope
That helped
Yes exactly since the product of the two is -1.
Okay so how do you know if the lines are neither?
If you place both lines in slope intercept form (y = mx + b), you can quickly see if the slopes are the same. If they are not, you can multiply the slopes and see if the product is -1. If neither of those occur, then the lines are not parallel (since they don't have the same slope) and they are not perpendicular (product of the slopes is not -1).
GreeneMath.com thank you!
Great and informative!
So glad it was helpful! :)
Thank you so much!!! It really helped me
You are very welcome! :)
You made this look easy bro
Perfect, thanks for watching :)
My problem with this is trying to learn how to write them in equation form
th-cam.com/video/w-bD-dXRT2s/w-d-xo.html that video deals with going between slope-intercept form, point-slope form, and standard form.
Really helped
I'm so glad to hear that! :)
THANK YOU!!!
You are very welcome! :)
Thanks really helped me
I'm glad to hear that! :)
How do you do equations like this
Like what? You didn't leave an example?
Thank you so much!!!
You are welcome! Good luck with your studies :)
Thank you thank you
You are very welcome :)
This was very helpful👍
I'm glad to hear that! :)
For the first equation, was it just to cancel out positive 3x?
What's the time marker?
2:02 where the 3x becomes negative? Could you explain that?
@@Isabel-lg7nr Go back to 1:52 in the video. I am solving the equation for y, so that it can be placed in slope-intercept form: y = mx + b. So we need y to be isolated on one side of the equation.
3x + 7y = 4
How can we get y by itself?
Subtract 3x away from each side
3x - 3x + 7y = 4 - 3x
Now 3x - 3x is 0 so it is canceled from the left-hand side:
7y = -3x + 4
Now you can solve for y by dividing both sides by 7:
y = -3/7 x + 4/7
So the slope of the line here is -3/7, given as the coefficient of x.
Does it have to -6x -2 or can you write it as -2-6x
You can write it either way. -6x - 2 is considered standard form. In most cases, that's the way you would want to go.
If cos theta = - 12/13 & theta lies in 2 quadrant then find tan theta .Plz tell me with explanation
Hi, this video is about slopes of parallel and perpendicular lines. I'm happy to answer related questions. I have a trig course that is free on my website GreeneMath.
Let’s hope this helps me understand 😭😭
If it doesn't just drop your example as a new comment and I'll try to help you out! :)
thank you so much
You are very welcome! :)
thnx u saved me
Perfect, I'm so glad to hear that! :)
I love you dude.
Awesome, thanks for watching :)
is it perpindicular if its a positive 1
No, the product of the slopes needs to be (-1) to have perpendicular lines.
thanks :)
Thanks :)
You are very welcome! :)
I have a problem like x=7 ; y=-5/6x=8 ; y=-5/6x-4 ; x=-9 and this doesn't help, sadly.
Well you are watching a video titled "slopes of parallel and perpendicular lines", which your problem doesn't seem to ask for. It looks like some sort of system of equations, but I think parts of the problem are mistyped.
Find polar coordinates of (x,y)= (1,1). Plz tell me with explanation
Hi, this video is about slopes of parallel and perpendicular lines. I'm happy to answer related questions. I have a trig course that is free on my website GreeneMath.
God bless you thanks
You are very welcome! :)
We can directly use -a/b to find slopes
Yes, you can do that also, but I wanted to tie this into our lesson on slope-intercept form.
Thank you so much 😊
You are very welcome! :)
I can never understand my teachers sometimes I have to break down stuff for myself cuz in my pov they make it more complicated for what my brain can already process already
Everyone learns differently, some students, such as myself do better with reading a textbook versus watching a lecture.
Great video
I'm so glad it was helpful! Good luck with your studies :)
Thanks
You are very welcome, good luck with your studies :)
thanks for helping
You are very welcome! :)
Aren’t you supposed to solve the -3x/7? That’s what I saw on another video
What do you mean by solve? How do you solve -3x/7? What does that even mean? The purpose is to find the slope so you can determine if the lines are parallel, perpendicular or neither.
@@Greenemath I’m sorry! I miss understood! I watched another video on this and that’s what the person did! On the example for my homework, it shows the same work that you displayed but simplified. The example was x+5y=2 and changed into 5y =-x+2 then divided by 5. One of my homework questions is 3x + 4y =-1. Do change it to the format of 4y=3x-1 ? Or keep it the way you did. When I solve it in the format you did I got the y=-3/4 x - 1/4
@@Isabel-lg7nr It would help to know what your homework question involves. You shouldn't have only one equation for the scenario of this video.
If you are trying to figure out if the lines are parallel or perpendicular, then you need the slope of each line. Putting the line in slope-intercept form: y = mx + b gives you the slope as m, the coefficient of x. In your case, you solved for y and got: y= -3/4 x - 1/4, which tells you that the slope for that line is -3/4. You need another line for this topic so you can compare the slopes and see if they are the same (for parallel lines) or multiple the slopes to see if the produce is -1 (for perpendicular lines).
@@Isabel-lg7nr Just to point out at 2:11 of the video, we solved for y here by dividing both sides of the equation by 7. The idea is to "solve for y", which means y is isolated on one side by itself.
Omg thank you :)
You are very welcome! :)
@@Greenemath wow just wow. Can you believe that 8 years ago at the start of my high school days I was watching your videos for extra help on understanding algebra. Fast forward to today and I recently graduated with a bachelors in mechanical engineering. It's the small things that add up to make a difference. Your videos helped me pull through back then and I bet they will keep helping new students as well. Keep up the good work.
@@PWAGEDUDE I'm really glad to hear that! I hope you can find work in this challenging environment. If not, you can always go to grad school. Good luck :)
Thankyou!!!
You are very welcome! :)
Thank you
You are welcome! Good luck with your studies :)
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You are very welcome! :)
M1=-4 m2=1/4
-4 * 1/4 = -1, so those two lines are perpendicular.
u legend
Thank you :)
Why the fuck did someone have to eat a bat
Hopefully it tasted good :)
UNHS 🥴
DannnySZN 👍
Perfect, thanks for watching :)
This video is deciding if I live or die. (not a joke)
Well hopefully it's helpful! If you are struggling with a problem, leave it in the comments and I'll help you out :)
Idk why I’m supposed to learn this
As my Algebra teacher once told me "to pass your algebra test" :)
i’m failing algebra bc of yhis dumb shit and ive gone to tutoring for this 6 times and i still don’t understand REEE
I'm sorry to hear that you are failing. I hope it gets better for you.
Day before midterms 1 am
hope you passed!
Now I have to study for science :(
Cool
/
Not sure what / means, if you are struggling drop your problem in the comments and let me try to help :)
Thank you so much!!!
You are very welcome! :)