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anonymous
 4 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
anonymous
 4 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

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0first find the slope, m=(y2y1)/(x2x1)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0then write it in slope intercept form yy1=m(xx1)

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

Directrix
 4 years ago
Best ResponseYou've already chosen the best response.2Points ( 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.

Directrix
 4 years ago
Best ResponseYou've already chosen the best response.2First, 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.

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

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

Directrix
 4 years ago
Best ResponseYou've already chosen the best response.2That 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.

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

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

Directrix
 4 years ago
Best ResponseYou've already chosen the best response.2dw:1329213587734:dw

Directrix
 4 years ago
Best ResponseYou've already chosen the best response.24/6 = 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. :)

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

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1329268007717:dw

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

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

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

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

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

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

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

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

Directrix
 4 years ago
Best ResponseYou've already chosen the best response.23y +3 = 2 (x2) 3y + 3 = 2x  4

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

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

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

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

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

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

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

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