Question:
How do you know whether to go up or down on a X,Y graph when you are trying to find a cordinate?
Tinkz
2007-06-14 11:00:01 UTC
I dont know if im making sense, but i am doing PREALGEBRA and we are doing those graph where X runs Horozontal and Y runs Vertical but both have negetives and positives so for instance if i have something like -4, 0 how do i know if i use the vertical negetives or the horozontals ones? I hope i didi not confuse anyone.
Six answers:
mark r
2007-06-14 11:03:24 UTC
the coordinates look like (x,y)



so for (-4,0), -4 is the x coord and 0 is the y coord.



Negative sign means down (below) the x-axis for x, and left of the y-axis for y.
Jeff Engr
2007-06-14 11:11:51 UTC
ALL X,Y Cartesian coordiante systems (unless specifically defined otherwiase) work as follows:



(-4,0) This menas -4 on the X and 0 on the Y



They will always follow this general alignment (x,y) (4,-2) would be positive 4 on the x axis and -2 on the y axis.



I hope this helps.
anonymous
2007-06-14 11:04:31 UTC
Traditionally, coordinates are written so that the first shows the x value and the second shows the y value. So to plot the point (-4,0), you'd start at (0,0), move over the LEFT four notches, and mark the point right there on the x-axis. The "0" here means we don't move up or down (against y) at all.
methodos
2007-06-14 11:16:59 UTC
Simple to remember, X is the line that goes left to right. Y is the line that goes up and down. X is always the first value and Y the second.



when deciding which direction you are going remember that positive are always to the RIGHT of ZERO on the X line and UP on the Y line.



Any negative number will always be to the LEFT of ZERO on the X line and Down on the Y line.



Another tip is always read left to right, X then Y, - then +
JSGeare
2007-06-14 11:03:42 UTC
X always comes first.
gerry817
2007-06-14 11:04:20 UTC
The first parameter is always "x" even if it is negative


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