anonymous
  • anonymous
Hello I really need help with one homework question
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
what question is it?
anonymous
  • anonymous
Find an equation of the line containing the given pair of points (-2,-4) and (-8,-9)
anonymous
  • anonymous
easy

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More answers

anonymous
  • anonymous
Great because I have been at it for over an hour!
anonymous
  • anonymous
hahaha. ok first draw a cartesian plane
anonymous
  • anonymous
ok
anonymous
  • anonymous
you know what that is? yes? ok then plot the two points on the plane
anonymous
  • anonymous
Ok
anonymous
  • anonymous
have you done that? then draw a line between the two points on the graph
anonymous
  • anonymous
Done
anonymous
  • anonymous
ok so now you have to draw the line so that it crosses the x and y axis
anonymous
  • anonymous
just extend the line
anonymous
  • anonymous
ok done
anonymous
  • anonymous
good so now do you know what rise / run is?
anonymous
  • anonymous
No
anonymous
  • anonymous
ok so umm, what are the points when you extend the line to the x and y axis?
anonymous
  • anonymous
-2,2
anonymous
  • anonymous
good. ok so um,.. hold on let me do this in my head for a sec ok? so um,... while you wait tell me a bit about urself.
anonymous
  • anonymous
I am a student and university of phoenix. I am not good at math at all.
anonymous
  • anonymous
In my help page it says to find the slope first
anonymous
  • anonymous
yes you have to find the slope first
anonymous
  • anonymous
to find the slope you have to do rise over run
anonymous
  • anonymous
I come up with -5/6 is that right?
anonymous
  • anonymous
hold on i'm a bit slow
anonymous
  • anonymous
sorry about that i'm just learning it myself
anonymous
  • anonymous
it willl take a while. sorry
anonymous
  • anonymous
sorry to interrupt.... the slope is 5/6
anonymous
  • anonymous
ya i think so. sorry i'm not very good, i'm trying my best. ok um. have you heard of y2-y2/x2-x1= ?
anonymous
  • anonymous
yea that is the same formula I used but my answer came up with a negative 5/6
anonymous
  • anonymous
two negatives make a positive
anonymous
  • anonymous
Ok then onto the problem then how do I work this in
anonymous
  • anonymous
ok well you work out what 5/6 is and that's .833
anonymous
  • anonymous
ok
anonymous
  • anonymous
=0.833(x-8) =
anonymous
  • anonymous
ok
anonymous
  • anonymous
ok so the answer is y=0.833x-2.336
anonymous
  • anonymous
No they gave the answer as 5/6x-7/3
anonymous
  • anonymous
use the point-slope form.. y-y1 = m (x-x1) take one given point and put in the x and y coordinates y + 4 =5/6 (x+2) isolate y: y = 5/6 (x + 2) - 4 expand and collect like terms: y = (5/6) x +5/3 - 4 y = (5/6) x - 7/3
anonymous
  • anonymous
Ok well I already got that one wrong so now I have a new one (-1,-8) and (-7,-6)
anonymous
  • anonymous
you still there?
anonymous
  • anonymous
slope = -2/6 = -1/3
anonymous
  • anonymous
The answer is as you posted above?
anonymous
  • anonymous
? you want the equation of the line right? hang on...
anonymous
  • anonymous
Ok Thanks!
anonymous
  • anonymous
y = (-1/3) x - 25/3
anonymous
  • anonymous
you are great thanks!!!!!!!!!
anonymous
  • anonymous
^o^ happy to help.
anonymous
  • anonymous
How about this one (-10,8);7x-5y=2
anonymous
  • anonymous
what are we looking for?
anonymous
  • anonymous
Write an equation of the line containing the given point and parallel to the given line. Express your answer as y-mx+b
anonymous
  • anonymous
y = (2/5) x + 22
anonymous
  • anonymous
Sorry I wrote that wrong it is (4,8);x-7y=5. I sent you my example question sorry.
anonymous
  • anonymous
Sorry it is x+7y not x-7y
anonymous
  • anonymous
y = (-1/7) x + 60/7
anonymous
  • anonymous
I really do not understand how you solve these ones but thanks. Can you help me with a couple more or is that not ok?
anonymous
  • anonymous
Ok, what does it mean for two lines to be parallel?
anonymous
  • anonymous
Is that OK?
anonymous
  • anonymous
Is what ok?
anonymous
  • anonymous
I would like to have help with another question
anonymous
  • anonymous
That's fine, but I was going to explain how to go about finding the answer to this one since you didn't actually learn anything from Applekiwi's response.
anonymous
  • anonymous
If you'd like to work on another problem, that's fine too.
anonymous
  • anonymous
I would like both help with solving the problem and explaining
anonymous
  • anonymous
Which problem?
anonymous
  • anonymous
(-2,7; 5x=4y+3
anonymous
  • anonymous
You want a parallel line that intersects (-2,7)?
anonymous
  • anonymous
Write an equation of the line containing the given point and parallel to the given line. Express your answer as y-mx+b
anonymous
  • anonymous
Sorry yes i forgot the other )
anonymous
  • anonymous
Ok, so what does it mean for two lines to be parallel?
anonymous
  • anonymous
They extend in the same direction
anonymous
  • anonymous
Equidistant at all points, and never converging or diverging
anonymous
  • anonymous
Are you still there?
anonymous
  • anonymous
Those are both good definitions. Let me give you a third. The reason that they are equidistant at all points is because they both have the same slope right?
anonymous
  • anonymous
Ok
anonymous
  • anonymous
Do you agree that makes sense?
anonymous
  • anonymous
Yes
anonymous
  • anonymous
So what is the slope of your original line?
anonymous
  • anonymous
5x=4y+3
anonymous
  • anonymous
5/4x-3/4?
anonymous
  • anonymous
that equals y, but what is the slope?
anonymous
  • anonymous
I don't know. How do I find the slope?
anonymous
  • anonymous
well, the slope intercept form of a line is y=mx + b where m is the slope, and b is the intercept. is that the form you have it in?

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