Coordinates !!!!!!!! HELP

Rachiesweet14

New member
Joined
Apr 20, 2012
Messages
19
How can you tell by examining two points whether they lie on a horizontal line? On a vertical line?
 
I said a horizontal line is parallel to the x axis therefore the two points must have the same y coordinate in order to lie on a horizontal line. A vertical line is parallel to the y axis therefore two points must have the same x coordinate to lie on a vertical line.
 
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