trying to help my sister, can someone help me

thetomps

Junior Member
Joined
Sep 26, 2005
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59
I am trying to help my sister can someone help me?

Find the midpoint of a line segment between the points (4,5) and (-14, -7) in the coordinate plane.
 

happy

Full Member
Joined
Oct 30, 2004
Messages
466
The midpoint of a segment with endpoints (x1 , y1) and (x2 , y2) has coordinates

(x1+x2)/2, (y1+y2)/2
 

thetomps

Junior Member
Joined
Sep 26, 2005
Messages
59
so what do I do to solve happy (sorry I am so lost)
 

happy

Full Member
Joined
Oct 30, 2004
Messages
466
use the formula I gave


(4,5)= (x1,y1)

(-14, -7)= (x2,y2)
 

thetomps

Junior Member
Joined
Sep 26, 2005
Messages
59
(-5, 1) ?
 

stapel

Super Moderator
Staff member
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Feb 4, 2004
Messages
15,943
Check the sign on your y-coordinate.

Eliz.
 

soroban

Elite Member
Joined
Jan 28, 2005
Messages
5,588
Hello, thetomps!

Find the midpoint of a line segment between the points (4,5) and (-14, -7) in the coordinate plane.
The midpoint between (x<sub>1</sub>,y<sub>1</sub>) and x<sub>2</sub>,y<sub>2</sub>)

. . is located at: .x = (x<sub>1</sub> + x<sub>2</sub>)/2, .y = (y<sub>1</sub> + y<sub>2</sub>)/2

In baby-talk: "Average the x's, average the y's".


We have: .x .= .[4 + (-14)]/2 .= .-10/2 .= .-5

. . . . . . . . .y .= .[5 + (-7)]/2 .= .-2/2 = -1


Therefore, the midpoint is: .(-5,-1)
 
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