Apply the rule (3x,3y) to the vertices of rectangle ABCD to get rectangle WXYZ.

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To apply the rule (3x, 3y) to the vertices of rectangle ABCD to get rectangle WXYZ, follow these steps:

1. Write down the coordinates of the vertices of rectangle ABCD. Let's assume that the coordinates are as follows:
Vertex A: (a, b)
Vertex B: (c, b)
Vertex C: (c, d)
Vertex D: (a, d)

2. Apply the rule (3x, 3y) to each of these coordinates. Multiply the x-coordinate by 3 and the y-coordinate by 3:
Vertex A: (3a, 3b)
Vertex B: (3c, 3b)
Vertex C: (3c, 3d)
Vertex D: (3a, 3d)

3. Write down the new coordinates. These will be the vertices of the transformed rectangle WXYZ:
Vertex W: (3a, 3b)
Vertex X: (3c, 3b)
Vertex Y: (3c, 3d)
Vertex Z: (3a, 3d)

Now you have the coordinates of the vertices of rectangle WXYZ after applying the rule (3x, 3y) to the vertices of rectangle ABCD.