Math Problem Statement

Graph the pre-image and the image of the figure using the transformation given (dilation about the origin). Find the coordinates of the image of each figure after the given transformation.

Solution

The two images you uploaded relate to dilations in geometry. Let's work through the problems together.

Explanation of Dilations:

A dilation is a transformation that enlarges or reduces a figure by a scale factor, with respect to a fixed point known as the center of dilation, which in these cases is the origin (0,0)(0, 0).

The formula for dilation is: (x,y)=(kx,ky)(x', y') = (k \cdot x, k \cdot y) Where:

  • (x,y)(x', y') are the coordinates after dilation,
  • kk is the scale factor,
  • (x,y)(x, y) are the original coordinates before dilation.

Now, let's go through the specific exercises from the worksheets.


First Worksheet: Graph the pre-image and the image of the figure

1. Dilation of 2 about the origin

Points:

  • V(1,2)V(-1, -2)
  • W(0,2)W(0, 2)
  • X(1,2)X(1, 2)
  • Y(2,1)Y(2, 1)

For a dilation of 2, multiply both xx and yy coordinates of each point by 2:

  • V(2,4)V'(-2, -4)
  • W(0,4)W'(0, 4)
  • X(2,4)X'(2, 4)
  • Y(4,2)Y'(4, 2)

2. Dilation of 5 about the origin

Points:

  • G(1,0)G(-1, 0)
  • H(1,1)H(1, 1)
  • I(1,0)I(1, 0)

For a dilation of 5:

  • G(5,0)G'(-5, 0)
  • H(5,5)H'(5, 5)
  • I(5,0)I'(5, 0)

3. Dilation of 0.5 about the origin

Points:

  • B(1,1)B(-1, 1)
  • C(2,2)C(2, 2)
  • D(1,1)D(1, -1)

For a dilation of 0.5:

  • B(0.5,0.5)B'(-0.5, 0.5)
  • C(1,1)C'(1, 1)
  • D(0.5,0.5)D'(0.5, -0.5)

4. Dilation of 2 about the origin

Points:

  • E(2,1)E(-2, -1)
  • F(2,2)F(-2, 2)
  • G(2,1)G(2, -1)

For a dilation of 2:

  • E(4,2)E'(-4, -2)
  • F(4,4)F'(-4, 4)
  • G(4,2)G'(4, -2)

Second Worksheet: Find the coordinates of the image after the transformation

5. Dilation of 14\frac{1}{4} about the origin

Points:

  • B(0,1)B(0, -1)
  • C(0,2)C(0, 2)
  • D(1,1)D(1, 1)

For a dilation of 14\frac{1}{4}:

  • B(0,0.25)B'(0, -0.25)
  • C(0,0.5)C'(0, 0.5)
  • D(0.25,0.25)D'(0.25, 0.25)

6. Dilation of 5 about the origin

Points:

  • C(0,1)C(0, -1)
  • D(1,1)D(-1, 1)
  • E(1,0)E(1, 0)

For a dilation of 5:

  • C(0,5)C'(0, -5)
  • D(5,5)D'(-5, 5)
  • E(5,0)E'(5, 0)

7. Dilation of 1.5 about the origin

Points:

  • E(2,1)E(-2, 1)
  • D(1,3)D(1, 3)
  • C(2,2)C(2, -2)

For a dilation of 1.5:

  • E(3,1.5)E'(-3, 1.5)
  • D(1.5,4.5)D'(1.5, 4.5)
  • C(3,3)C'(3, -3)

8. Dilation of 2 about the origin

Points:

  • H(0,1)H(0, 1)
  • G(1,1)G(1, 1)
  • F(1,1)F(1, -1)

For a dilation of 2:

  • H(0,2)H'(0, 2)
  • G(2,2)G'(2, 2)
  • F(2,2)F'(2, -2)

Would you like further explanation on any of these problems? Here are 5 questions to explore the concept further:

  1. How would the dilation change if the center was not the origin?
  2. What happens when the scale factor is negative?
  3. Can you explain the effect of a dilation with a scale factor between 0 and 1?
  4. How do dilations affect the area of a figure?
  5. What is the relationship between the original shape and its image after dilation?

Tip:

Always multiply both the xx and yy coordinates by the scale factor to correctly calculate the image points under dilation.

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Math Problem Analysis

Mathematical Concepts

Geometry
Transformations
Dilations

Formulas

Dilation formula: (x', y') = (k * x, k * y)

Theorems

Dilation Theorem: A dilation is a transformation that produces an image that is the same shape as the original, but is a different size.

Suitable Grade Level

Grades 9-10