It was the French mathematician Rene Descartes who created coordinated geometry using an horizontal x axis and a vertical y axis that are perpendicular to each other
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The line is x=0 otherwise known as the y-axis.
(x-1, y)
The coordinates are: (-4, -6) and (12, 2)
On the Cartesian plane x is the horizontal axis and y is the vertical axis and they intercept each other at 90 degrees at the point of origin which is the coordinates of (0, 0)
To find the x-coordinate of a point on the xy-plane, you look at the horizontal distance of the point from the y-axis. The y-coordinate of a point on the xy-plane is the vertical distance of the point from the x-axis.