Question 1117888
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I could guess what the problem really is....<br>
But if you want help with a question, it would be polite to make sure you have stated the question correctly.<br>
With a dilation centered at (0,0), you need the coordinates of a point and a scale factor; a rotation has nothing to do with a dilation.  The wording of your question is nonsense.<br>
The solution to the question you are apparently asking about is trivial.  By definition, the dilation centered at (0,0) of the point (a,b) with a scale factor n is the point (na,nb).