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IRINA_888 [86]
3 years ago
15

What is the rule for the reflection?

Mathematics
2 answers:
Aneli [31]3 years ago
8 0

Answer:

D. \text{rx-axis}(x,y)\rightarrow (x,-y).

Step-by-step explanation:

We have been been given an image of reflection on coordinate plane and we are asked to find the rule for the given reflection.

Upon looking at our given image, we can see that its vertices are A(-1,0), B(0,2), C(3,2) and D(4,0).

The vertices of pre-image are A'(-1,0), B(0,-2), C(3,-2) and D(4,0).

Since the x-coordinate are same and y-coordinates has changed to their opposite sign, therefore, the given image is reflected across x-axis to get the pre-image.

The rule of reflection an image across x-axis is \text{rx-axis}(x,y)\rightarrow (x,-y).

Therefore, option D is the correct choice.

HACTEHA [7]3 years ago
6 0
When you reflect a point across the y-axis, the y-coordinate remains the same, but the x-coordinate is transformed into its opposite (its sign is changed). ... the line y = x is the point (y, x). The reflection of the point (x,y) across. the line y = -x is the point (-y, -x)
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dedylja [7]

Step-by-step explanation:

you must have made a typo here.

none of the answer options are correct for the given problem.

let me just show you what you told me, and how I can solve at least this :

2a/4 = b/4

this simply means (multiply both sides by 4) :

2a = b

so, 5b is then (multiplying both sides by 5) :

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10a = 5b

but again, "10a" is not among the offered answers.

so, I don't know if you made a mistake with the basic problem or with the answer options.

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Step-by-step explanation:

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