anonymous
  • anonymous
Graph (1, 2) slope =3
Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
I graphed (1, 2) but I have the slope -3 which way do I move in down or the right/left?
anonymous
  • anonymous
find x and y
anonymous
  • anonymous
The answer?

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More answers

anonymous
  • anonymous
first find x and y then you can find the answer...:)
anonymous
  • anonymous
How its not making any sense to me?
anonymous
  • anonymous
just find it please.
yamyam70
  • yamyam70
(1,2) is the same as (x,y) right?
yamyam70
  • yamyam70
where, x=1 ,y=2
anonymous
  • anonymous
Yea it is
anonymous
  • anonymous
yes,right.
yamyam70
  • yamyam70
then the slope is three.
anonymous
  • anonymous
@hubbabubba , did you find that?
yamyam70
  • yamyam70
make sense now? :)
anonymous
  • anonymous
Nope
anonymous
  • anonymous
@yamyam yes it does make sense but what if its negative which way do I move?
anonymous
  • anonymous
For negative slope, you want x and y to change in opposite directions.... so you either go UP and LEFT, or DOWN and RIGHT.
anonymous
  • anonymous
@DebbieG , said...
anonymous
  • anonymous
So either is right? @debbieG
yamyam70
  • yamyam70
so when 3 is the slope , it is understood that 3 / 1 , move up three times move right 1 time , is this correct @PFEH.1999 ?
anonymous
  • anonymous
Right???
anonymous
  • anonymous
Thats wat I was thinking tho
anonymous
  • anonymous
yes.
anonymous
  • anonymous
but @DebbieG can help you better.
anonymous
  • anonymous
Actually theres soneone else wbo helped me and I really understood it perfectly.
anonymous
  • anonymous
Someone*
DebbieG
  • DebbieG
Yes, @PFEH.1999 has it exactly. You just need one other point. You have x=1, y=2 and a slope of -3 So you can EITHER change y by +3 and x by -1 OR change y by -3 and x by +1 Either will give you another point on the line. x=1, y=2 Option 1 gives you x=0, y=5 Option 2 give you x=2, y=-1 Both are points on the line, you only need 1 of them but you can get either Something like this: one.|dw:1378568502217:dw|
anonymous
  • anonymous
Ok wat if the points are (-2,-3) and slope is undefined? And please one by one not together. I only listen to one person at a time
anonymous
  • anonymous
Wow nice way of explanation :D
DebbieG
  • DebbieG
Do you know what kind of line has undefined slope? There is something "special" about a line with undefined slope. As soon as you hear that the slope is undefined, you should think, "Oh, well then this is a ________________ line!" What goes in the blank? :)
anonymous
  • anonymous
Vertical?
anonymous
  • anonymous
remember! tan90 = undefined
DebbieG
  • DebbieG
Exactly! and a vertical line does NOT depend on the y-coordinate, only on the x-coordinate! So y is not involved in the equation for the line. Instead, the line has equation: x=a for some CONSTANT value of a. All you need to KNOW is the x-coordinate, because for ANY value of y, the point (a, y) is somewhere on the line.
anonymous
  • anonymous
|dw:1378568814110:dw|
DebbieG
  • DebbieG
So if slope is undefined (meaning line is vertical).... ....and (-2,-3) is a point on the line..... Then WHAT is the equation for this line?
anonymous
  • anonymous
Before I a swer ur question
anonymous
  • anonymous
Answer*
anonymous
  • anonymous
x = -2
DebbieG
  • DebbieG
@PFEH.1999 , PLEASE don't bring trig into this, he already said that this is only algebra and I don't think he has had or needs to use trig. :) It will only confuse matters.
anonymous
  • anonymous
|dw:1378568966305:dw|
anonymous
  • anonymous
@DebbieG , ok ok but he said answer!
anonymous
  • anonymous
By the way im a SHE not a he
DebbieG
  • DebbieG
lol sory @hubbabubba .... couldn't tell from the name. :) OK, but @PFEH.1999 , I don't see where she said the answer, I was trying to GET her to the answer and you said the answer. Please don't do that.
anonymous
  • anonymous
And I never said answer @ PFEH.1999
anonymous
  • anonymous
Calm down please @ DebbieG
anonymous
  • anonymous
I was gonna ask a question
anonymous
  • anonymous
sorry!I thought she meant "answer"!
anonymous
  • anonymous
but the thing is "She now know it" !
anonymous
  • anonymous
I just wanna kno am I talking to both guys or one lady and one guy or both guys????
anonymous
  • anonymous
so @DebbieG , please calm down :)
yamyam70
  • yamyam70
Peace in this site :)
anonymous
  • anonymous
Any suggestions? @yamyam70 other than peace
DebbieG
  • DebbieG
lol really, I'm not "not calm"... I just think that the student learns better when you can lead them to figure out the answer. Only if that fails would I tell an answer and then work backwards to see if they can understand it, but I think she was on the verge of telling us the equation. :) @hubbabubba I am female. I always thought that was obvious due to the name, but I've had people confused because of my profile pic, lol. Those are my sons. :)
anonymous
  • anonymous
Ok cool
DebbieG
  • DebbieG
@yamyam70 , Peace.... yams... and math! :)
yamyam70
  • yamyam70
:D
anonymous
  • anonymous
Go on help me im not staying whole day u kno
anonymous
  • anonymous
you're talking to one guy and one lady... but i'm very sorry and I repeat: the thing is"She now know it!"
DebbieG
  • DebbieG
Yes, understood, no biggie. :) Just sharing my philosophy... :)
anonymous
  • anonymous
Ouch! Ok so ur a guy? @PFEH.1999
anonymous
  • anonymous
yes,any problem?:D
anonymous
  • anonymous
No
anonymous
  • anonymous
Ouch! Ok so ur a guy? @PFEH.1999
anonymous
  • anonymous
Can we all come back to the question now PLEASE
anonymous
  • anonymous
have a big problem : I can't explain anything simply .. so I won't come back :D
anonymous
  • anonymous
As u like :) thanx tho
DebbieG
  • DebbieG
What do you still need to have explained, @hubbabubba ? I said above: So if slope is undefined (meaning line is vertical).... ....and (-2,-3) is a point on the line..... Then WHAT is the equation for this line?
anonymous
  • anonymous
So undefined means nothing not zero right?
DebbieG
  • DebbieG
And please don't be so demanding... saying things like "Go on help me im not staying whole day u kno" is not very polite. Anyone here who is helping you is doing it on their own time, voluntarily, just to be helpful to a total stranger. I am trying to help you, in-between getting my kids lunch, getting ready for a birthday party later, and doing work for the math teaching job that I actually get a paycheck for. :) OK?
anonymous
  • anonymous
Im sorry I didnt mean it like that I apologize sincerely to u
DebbieG
  • DebbieG
Yes, undefined means... "does not exist". Think about why the slope is undefined for a vertical line... EVERY x coordinate is THE SAME, right? So when you try to use the slope formula: \[\Large m=\frac{ y_1-y_2 }{x_1-x_2 }\] ...just look at what will happen in that denominator? \(\Large x_1=x_2 \) Since all the x's on a vertical line are the same, so you get division by 0, so undefined.
anonymous
  • anonymous
Ok right
DebbieG
  • DebbieG
Apology accepted. :) Now, notice that undefined slope is different from slope=0. Another "special" kindof line has m=0. That's when you get a 0 in the NUMERATOR of the slope formula: \[\Large m=\frac{ y_1-y_2 }{x_1-x_2 }\] which happens when \(\Large y_1=y_2\) which is true when all of the y-coordinates are the same, which is true when the line is HORIZONTAL.
DebbieG
  • DebbieG
So slope undefined means: - line is vertical - all the x's on the line are the same - the equation doesn't involve y, because it doesn't matter what y is, all the x's are the same - every point on the line is of the form (a, y) for some constant a and ANY value of y So, e.g., if (-5,7) is on a line with undefined slope, then that is a vertical line with equation: x=-5 Slope=0 means: - line is horizontal - all the y's on the line are the same - the equation doesn't involve x, because it doesn't matter what x is, all the y's are the same - every point on the line is of the form (x, b) for some constant b and ANY value of x So, e.g., if (-5,7) is on a line with slope=0, then that is a horizontal line with equation: y=7
DebbieG
  • DebbieG
So for YOUR line: slope is undefined (-2,-3) is a point on the line..... so... WHAT is the equation for this line?
anonymous
  • anonymous
Undefined= y2 - (-3)/ x2 - (-2) right?

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