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(3,0)
The coordinates of a point two units to the right of the y-axis and three units above the x-axis would be (2,3).
There are infinitely many possible correspondences between points in the coordinate plane. Some examples: Every point with coordinates (x+1, y) is one unit to the right of the point at (x, y). Every point with coordinates (x, y+1) is one unit up from the point at (x, y). Every point with coordinates (x, -y) is the reflection, in the y-axis of the point at (x, y).
Coordinates are linear and/or angular quantities that designate the position of a point in relation to a given reference frame. In a two-dimensional plane, x and y are commonly used to designate coordinates of a point.
The average of the x coordinates of the point(s) is the x coordinate of the mid point, The average of the y coordinates of the point(s) is the y coordinate of the mid point, and so on, through 3, 4 dimensions, etc.