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please answer this:
How will you determine the equation of the line if the given are two points of the line?
i really need the answer...
thank you
 2 years ago
 2 years ago
please answer this: How will you determine the equation of the line if the given are two points of the line? i really need the answer... thank you
 2 years ago
 2 years ago

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ChrisVBest ResponseYou've already chosen the best response.1
first find the slope, m=(y2y1)/(x2x1)
 2 years ago

ChrisVBest ResponseYou've already chosen the best response.1
then write it in slope intercept form yy1=m(xx1)
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
What if I make up two points and work the problem I made up? Will that help?
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
Points ( 2, 1 ) and ( 4, 5 ) lie on a line. Find the equation of the line that contains then. Leave your answer in y = mx + b form.
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
First, get the slope. Think of slope as change in y over change in x. m designates the slope of a line and has formula [y2  y1] / x2  x 1 ] . The y2 is not y^2 but what we call y sub 2 because the 2 is a subscript which is hard to type.
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
One of our points will be (x1, y1) and the other (x2, y2) It does not matter which is which.
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
Let (x1,y1) be (2, 1) and let (x2, y2) be (4, 5) Questions so far?
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
That is the form we will leave the equation of our line in. So, if we get something like 2x + 7y = 2/3, then that's not y = mx+b form.
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
You don't have to leave the equation in that form unless instructed to do so. Most books do request that or standard form.
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
Focus on cranking out this slope right now.
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
dw:1329213587734:dw
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
4/6 = 2/3 so the slope m is 2/3. Note the use of grouping symbols to help prevent sign problems or "sinus" problems as I call them. :)
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
Do you follow how the slope came to be 2/3?
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
Hey, I like "okey." I understand it means "yes."
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
Okey, now we use the point slope formula to get the equation of the line.
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
y  y1 = m (x  x1) y  y1 = (2/3) ( x  x1)
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
(x1,y1) be (2, 1) from above. y  (1) = (2/3) ( x  2)
 2 years ago

pau08Best ResponseYou've already chosen the best response.0
oh, i change my mind i don't want to answer it
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
We're almost finished. I'll finish if you have to go.
 2 years ago

pau08Best ResponseYou've already chosen the best response.0
i'll have to go now eh... can we finish it now??
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
y  (1) = (2/3) ( x  2) y + 1 = 2/3 (x  2) multiply both sides by 3 3(y + 1) = (3) (2/3) (x2)
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
3y +3 = 2 (x2) 3y + 3 = 2x  4
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
Yes, thought you left, :) 3y = 2x  7
 2 years ago

pau08Best ResponseYou've already chosen the best response.0
so the answer id 2x+3y=43
 2 years ago

pau08Best ResponseYou've already chosen the best response.0
the final answer is 2x3y=7
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
y = (2/3) x  7/3 in y = mx + b form where m is the slope and (7/3) is the yintercept.
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
Look at the cool graph: http://www.wolframalpha.com/input/?i=line+%282%2C1%29+and+%284%2C5%29+
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
One last word. There is no quick and short way to learn math but once you do learn it, you will be proud of yourself.
 2 years ago

DirectrixBest ResponseYou've already chosen the best response.2
Just takes practice like anything else. :)
 2 years ago

pau08Best ResponseYou've already chosen the best response.0
haha....thanks for your help.......what is the answer?
 2 years ago
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