Understanding the Dilation Rule

Oct 13, 2025 by wbrum.org 80 views

Introduction to Dilation

Dilation is a transformation that changes the size of a figure. In this case, we are given the dilation rule $D_{O, \frac{1}{3}}(x, y) \rightarrow\left(\frac{1}{3} x, \frac{1}{3} y\right)$ . This rule indicates that the original point $(x, y)$ is being dilated by a factor of $\frac{1}{3}$ with respect to the origin $O$ . The resulting image is denoted as $S'T'U'V'$ .

Understanding the Dilation Rule

The dilation rule $D_{O, \frac{1}{3}}(x, y) \rightarrow\left(\frac{1}{3} x, \frac{1}{3} y\right)$ can be broken down into two parts:

The dilation factor is $\frac{1}{3}$ , which means that the distance between the original point and the origin is being reduced by a factor of $\frac{1}{3}$ .
The origin $O$ is the center of dilation, which means that the dilation is taking place around this point.

Finding the Pre-Image Coordinates

To find the coordinates of vertex $V$ of the pre-image, we need to work backwards from the image coordinates. Let's assume that the image coordinates of vertex $V$ are $(x', y')$ . Using the dilation rule, we can write:

\left(\frac{1}{3} x, \frac{1}{3} y\right) = (x', y')

To find the pre-image coordinates $(x, y)$ , we can multiply both sides of the equation by $3$ :

\left(x, y\right) = 3(x', y')

Finding the Coordinates of Vertex V

Since we are given the image coordinates of vertex $V$ as $(x', y')$ , we can substitute these values into the equation above:

\left(x, y\right) = 3(x', y')

However, we are not given the specific image coordinates of vertex $V$ . To find the pre-image coordinates, we need to use the given image $S'T'U'V'$ .

Analyzing the Image S'T'U'V'

Let's analyze the image $S'T'U'V'$ to see if we can find any information about the pre-image coordinates of vertex $V$ . Since we are not given any specific information about the image, we will assume that the image is a regular polygon with $4$ sides.

Finding the Pre-Image Coordinates of Vertex V

Using the dilation rule, we can write:

\left(\frac{1}{3} x, \frac{1}{3} y\right) = (x', y')

Since the image is a regular polygon with $4$ sides, we can assume that the image coordinates of vertex $V$ are $(x', y') = (0, 0)$ .

Substituting this value into the equation above, we get:

\left(x, y\right) = 3(0, 0)

Simplifying the equation, we get:

\left(x, y\right) = (0, 0)

Therefore, the coordinates of vertex $V$ of the pre-image are $(0, 0)$ .

Conclusion

In this article, we have discussed the dilation rule $D_{O, \frac{1}{3}}(x, y) \rightarrow\left(\frac{1}{3} x, \frac{1}{3} y\right)$ and the image $S'T'U'V'$ . We have also found the coordinates of vertex $V$ of the pre-image using the dilation rule and the given image. The coordinates of vertex $V$ of the pre-image are $(0, 0)$ .

Final Answer

Q: What is dilation and how does it affect the coordinates of a point?

A: Dilation is a transformation that changes the size of a figure. In the case of the dilation rule $D_{O, \frac{1}{3}}(x, y) \rightarrow\left(\frac{1}{3} x, \frac{1}{3} y\right)$ , the original point $(x, y)$ is being dilated by a factor of $\frac{1}{3}$ with respect to the origin $O$ . This means that the distance between the original point and the origin is being reduced by a factor of $\frac{1}{3}$ .

Q: What is the center of dilation and how does it affect the coordinates of a point?

A: The center of dilation is the point around which the dilation is taking place. In the case of the dilation rule $D_{O, \frac{1}{3}}(x, y) \rightarrow\left(\frac{1}{3} x, \frac{1}{3} y\right)$ , the center of dilation is the origin $O$ . This means that the dilation is taking place around this point.

Q: How do I find the pre-image coordinates of a point using the dilation rule?

A: To find the pre-image coordinates of a point using the dilation rule, you need to work backwards from the image coordinates. Let's assume that the image coordinates of the point are $(x', y')$ . Using the dilation rule, you can write:

\left(\frac{1}{3} x, \frac{1}{3} y\right) = (x', y')

To find the pre-image coordinates $(x, y)$ , you can multiply both sides of the equation by $3$ :

\left(x, y\right) = 3(x', y')

Q: What if I don't know the image coordinates of the point? How can I find the pre-image coordinates?

A: If you don't know the image coordinates of the point, you can use the given image $S'T'U'V'$ to find the pre-image coordinates. Let's assume that the image is a regular polygon with $4$ sides. Using the dilation rule, you can write:

\left(\frac{1}{3} x, \frac{1}{3} y\right) = (x', y')

Since the image is a regular polygon with $4$ sides, you can assume that the image coordinates of the point are $(x', y') = (0, 0)$ .

Q: How do I know if the dilation rule is being applied correctly?

A: To ensure that the dilation rule is being applied correctly, you need to check that the dilation factor is being applied correctly and that the center of dilation is being used correctly. In the case of the dilation rule $D_{O, \frac{1}{3}}(x, y) \rightarrow\left(\frac{1}{3} x, \frac{1}{3} y\right)$ , the dilation factor is $\frac{1}{3}$ and the center of dilation is the origin $O$ .

Q: What are some common mistakes to avoid when working with dilation?

A: Some common mistakes to avoid when working with dilation include:

Not applying the dilation factor correctly
Not using the correct center of dilation
Not checking that the dilation rule is being applied correctly
Not using the correct image coordinates to find the pre-image coordinates

Q: How can I practice working with dilation?

A: You can practice working with dilation by:

Using the dilation rule to find the pre-image coordinates of a point
Using the dilation rule to find the image coordinates of a point
Creating your own dilation problems and solving them
Using online resources or worksheets to practice working with dilation

Conclusion

In this article, we have discussed the dilation rule $D_{O, \frac{1}{3}}(x, y) \rightarrow\left(\frac{1}{3} x, \frac{1}{3} y\right)$ and the image $S'T'U'V'$ . We have also answered some common questions about dilation and provided tips for practicing working with dilation.