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Triangle RST has the coordinates R (0.2), S (3.8), and T (6,2). Which of the following sets of

points represents a dilation from the origin of triangle RST?
A. R’ (0, 2), S' (3, 48), T' (36, 2)
B. R’ (0, 2), S' (18,8), T’ (36,2)
C. R’ (0, 12), S' (18,48), T’ (36, 12)
D. R’ (6,8), S' (9, 14), T’ (12,8)

User Rodrigocf
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1 Answer

4 votes

Final answer:

Option B provides a set of points that represent a dilation of triangle RST from the origin with a consistent scale factor of 6 applied to the x-coordinates, while the y-coordinates remain unchanged. Thus, R’ (0, 2), S' (18,8), T’ (36,2) is the correct dilation.

Step-by-step explanation:

To determine which set of points represents a dilation of the triangle RST from the origin, we look for a constant scale factor applied to the coordinates of R (0,2), S (3,8), and T (6,2). A dilation from the origin means that each coordinate of R', S', and T' should be the original coordinate of R, S, and T respectively, multiplied by the same scale factor.

By checking the given options, we see that only option B satisfies this condition:

  • R’ (0, 2) is 0 and 2 multiplied by 1, retaining the original R.
  • S' (18,8) means 3 multiplied by 6 and 8 multiplied by 1, not respecting the same factor for both x and y.
  • T’ (36,2) has 6 multiplied by 6 for the x-coordinate, and 2 remains the same, indicating the scale factor for the x-coordinate is 6 and for the y-coordinate is 1.

Since B is the only option where the x-coordinates have been consistently multiplied by the same factor (6), and the y-coordinates have remained unchanged (indicating a scale factor of 1), B is the correct answer.

User Endran
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7.6k points