Question

Triangle WXY has coordinates W(1, 5), X(1, 1), and Y(5, 1). Which of the following sets of points represents a dilation of triangle WXY?
A.
W'(1, 9); X'(1, 1); Y'(5, 1)
B.
W'(2, 10), X'(2, 2), Y'(10, 2)
C.
W'(2, 6), X'(2, 2), Y'(10, 2)
D.
W'(2, 10), X'(6, 2); Y'(10, 2)

Answer 1

The correct answer for the question shown above is the second option, the option B, which is: B. W'(2, 10), X'(2, 2), Y'(10, 2) 
 The explanation is shown below: As you can see, the original triangle has the following coordinates  W(1, 5), X(1, 1), and Y(5, 1); the triangle must be dilated by a common scale factor, so if you analize the option B, you can notice that the triangle was dilated by a scale factor of 2.