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If your points are (p,f), they become (p,-f).

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Q: How doe the reflection across the x axis change the coordinates pf a point?
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Related questions

How does reflection across the y-axis change the coordinates of the orignal point?

y' = y, x' = -x.


How does a reflection across the y axis change the coordinates of a point?

Reflection across the y-axis changes the sign of the x - coordinate only, that is, (x, y) becomes (-x, y).


What does reflection over the y-axis mean?

Example: if you have a point with the coordinates (2,4), a reflection over the y-axis will result in the point with coordinates (-2,4).


What is the reflection image of P 0 0 after two reflections first across x -3 and then across y -3?

Each reflection produces a mirror image.=================================Answer #2:With the initial point at (0, 0) ... the origin of coordinates ...-- the first reflection, across x = -3, moves the point to (-6, 0), and-- the second reflection, around y = -3, moves it to (-6, -6) .


How do you find the coordinates of a quadrilateral after reflecting it over the y axis?

If the coordinates of a point, before reflection, were (p, q) then after reflection, they will be (-p, q).


What is the reflection of point (-16) across the lines yx?

It is (6, -1).


Will the distance between a point with a whole number coordinates and its reflection over the X axis always be even?

Yes, it will.


A point P has coordinates (1, 4). What are its new coordinates after reflecting point P across the x-axis?

The answer is simple, it is: (-1, -4) EZ(Easy)


How do the coordinates of a point change when it is reflected over the y-axis?

me no no


Will the distance between a point with whole number coordinates and its reflection over the x-axis always be an even number?

Yes. Suppose the point is P = (x, y). Its reflection, in the x-axis is Q = (x, -y) and then |PQ| = 2y.


What are the coordinates of D' if quadrilateral ABCD is reflected about the x-axis?

In order to answer that, I need to know the position of ABCD with respect tothe x-axis before the reflection process begins.But wait! What light through yonder window breaks ? ! On second thought, maybe I don't.If D is the point (x, y) before the reflection, then D' is the point (x, -y) after it.


How do you determine the coordinates of a point after a reflection in the x-axis?

The points after reflection will follow points equal but different direction, to the path followed before the reflection. So, if the line would cover 3.5 on the x and 5 on the y; it will reflect symmetrically giving you the formula to get your answer.