1. ## Math problem...

Can someone help me ?

Determine the equation of bisector straight r on AB segment.
Information:
A(1, 4)
B(3, 2)

Thanks @Jigsaw for translating

2. And sorry for my translation.

3. Could you tell me the name of the Chapter? Or the name of this particular Subject? I don't know any mathematical language, in English.

I believe @Alen is pretty good at Maths

4. @Capevaldo
@Ravallo: This question is quite an advanced linear graph question. It's about a year 9-11 question. It involves calculating midpoints, finding the normal/gradient of a graph, finding equations by using formulas etc.
First of all, find the mid point.
(2,3)

Second, find the the gradient of the 2 points using the formula: y1-y2/x1-x2= 4-2/1-3=2/-2=-1
Therefore m= -1.
The bisector must be the normal of the gradient as it is perpendicular.
Normal= -1/m

Use the formula
y2-y1=m(x2-x1)
sub in the midpoint and gradient of the bisector
y-3=1(x-2)
y=x+1

Sorry if I'm wrong, I was in a rush.

If in assistance of any math problems, I can try to assist you in the future.

5. ## The Following User Says Thank You to Dr.Dental For This Useful Post:

Capevaldo (05-12-2011)

6. I think you're right, @Foxy.

My math book has answers for exercises... the answer for this exercise is
x - y + 1 = 0

And your answer is: y = x + 1 ~~> x - y + 1 = 0
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