Triangle wxy has coordinates w(1, 4), x(1, 1), and y(4, 1). which of the following sets of points represents a dilation of triangle wxy?

The answer is the second option, option B, which is: B. W'(2,8), X'(2,2), Y'(8,2)
 The explanation is shown below:
 You have the Triangle WXY has coordinates W(1,4), X(1,1), and Y(4,1) and the Triangle of the option B has coordinates W'(2,8), X'(2,2), Y'(8,2). As you can notice, the coordinates of the new triangle are the result of multiply the coordinates of the original triangle by a scale of factor of 2. Therefore, in other words, the Triangle WXY was dilated with a scale of factor of 2.