Line segment AB

𝐴
𝐵
has endpoints A (−6, 4)
𝐴

(

6
,

4
)
and B (−8, 2)
𝐵

(

8
,

2
)
. Find the coordinates of A′
𝐴

and B′
𝐵

after a dilation with a scale factor of 12
1
2
, centered at the origin.(1 point)
A′
𝐴


() B′
𝐵

1 answer

To find the coordinates of the points A' and B' after a dilation with a scale factor of \(\frac{1}{2}\) centered at the origin, we use the formula for dilation:

\[ (x', y') = (kx, ky) \]

where \( k \) is the scale factor, and \( (x, y) \) are the original coordinates of the point.

  1. For point A (-6, 4):

    Using the scale factor \( k = \frac{1}{2} \):

    \[ A' = \left(\frac{1}{2} \cdot -6, \frac{1}{2} \cdot 4\right) = \left(-3, 2\right) \]

  2. For point B (-8, 2):

    Using the same scale factor \( k = \frac{1}{2} \):

    \[ B' = \left(\frac{1}{2} \cdot -8, \frac{1}{2} \cdot 2\right) = \left(-4, 1\right) \]

Therefore, the coordinates after the dilation are:

  • \( A' = (-3, 2) \)
  • \( B' = (-4, 1) \)

Final results:

  • \( A' = (-3, 2) \)
  • \( B' = (-4, 1) \)