In the plane rectangular coordinate system, if the point (x.y) is translated a unit length to the left, and then B unit length to the down, the result is ()

In the plane rectangular coordinate system, if the point (x.y) is translated a unit length to the left, and then B unit length to the down, the result is ()

The point after translation is (x + A, y-b)
Left plus right minus, top plus bottom minus. Left and right correspond to the x-axis direction, which is a very coordinate thing. Up and down are the y-axis direction, which is an ordinate thing

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