how do you plot an ordered pair in the cartesian plane?
Let's say you want to plot the ordered pair (4, 7)
Draw an x and y axis like this
The first coordinate of (4, 7), called the x-coordinate, is 4.
Locate 4 on the x-axis, the horizontal axis, and
draw a vertical line through it, like this:
The second coordinate of (4, 7), called the y-coordinate, is 7.
Now locate 7 on the y-axis, the vertical axis, and
draw a horizontal line through it, like this:
Draw a dot where these two lines cross:
Finally erase the two guide lines:
Eventually you won't find it necessary to draw those two lines at all.
So you won't even have to erase them. Just draw a dot which is directly
above or below the x-coordinate on the x-axis and which is directly to the
right or left of the y-coordinate on the y-axis.
To plot the ordered pair (-5,3)
To plot the ordered pair (-4, -4)
If just one of the coordinates is 0, the point is ON the axis of the
coordinate that is NOT 0.
To plot the ordered pair (0, 6), the 6 is not 0, and it is the y-coordinate
so (6, 0) is ON the y-axis at 6. Look carefully and you'll see it marked
at 6 on the y-axis of the graph below:
To plot the ordered pair (-5,0), the -5 is not 0, and it is the x-coordinate
so (6, 0) is ON the x-axis at -5.
Finally if both coordinates are 0, that is, (0,0), then to plot this ordered
pair, draw a dot where the axes cross. This special point is called the
"origin".
Edwin
AnlytcPhil@aol.com
