Math Problem Statement

What are the coordinates of the image of R for a dilation with center (0, 0) and scale factor 1/3?

Solution

The question asks for the coordinates of the image of point R(3,2)R(3, -2) after a dilation with center (0,0)(0, 0) and a scale factor of 13\frac{1}{3}.

Solution:

The formula for dilation with a center at the origin (0,0)(0, 0) is given by: (x,y)=(kx,ky)(x', y') = (kx, ky) where (x,y)(x, y) are the original coordinates, kk is the scale factor, and (x,y)(x', y') are the coordinates after dilation.

Given:

  • Original point R(3,2)R(3, -2)
  • Scale factor k=13k = \frac{1}{3}

We apply the formula: x=13×3=1x' = \frac{1}{3} \times 3 = 1 y=13×(2)=23y' = \frac{1}{3} \times (-2) = -\frac{2}{3}

So, the coordinates of the image of RR after dilation are: R(1,23)R'(1, -\frac{2}{3})

Would you like to go over more details on this, or have any further questions?

Here are five questions for further practice:

  1. What are the coordinates of P(6,1)P(6, -1) after the same dilation?
  2. How would you calculate the dilation of point Q(3,4)Q(3, 4) with a different scale factor, say 22?
  3. How does the distance between the points change after dilation by 13\frac{1}{3}?
  4. What would happen to point RR if the scale factor was negative, say 13-\frac{1}{3}?
  5. Can dilation be performed with a center point that is not (0,0)(0, 0)? How would the formula change?

Tip: When performing dilation, always multiply both the x and y coordinates by the scale factor to get the new location.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Geometry
Dilation
Coordinate Transformation

Formulas

(x', y') = (kx, ky) where k is the scale factor

Theorems

Dilation theorem

Suitable Grade Level

Grades 8-10