Answer:
The rule for the x-coordinates would be (x-0) or simply (x).
Explanation:
What is a translation?
A translation is any movement left, right, up, or down that changes or shifts the placement of a given shape on a Cartesian plane.
It can be represented using translation/mapping rules.
For example, let us say that a triangle was moved six units right (x) and two units down (y). This can be represented as (x+6), as we are moving six units right, and (y-2), as we are moving two down.
Mapping Rule: (x+6),(y-2)
The above image shows an up-down movement; there is only a change in its position towards the y-axis, not the x-axis. (X-coordinates stay the same, whereas the Y-coordinates change).
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Recall that when anything moves up/down, it changes the y-coordinates; when there is a left/right movement, it changes the x-coordinates.
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Hence, you can write the mapping/translation rule for the x-coordinates (no change) as (x plus or minus 0) or simply (x).