A dilation centered at the origin takes $\begin{pmatrix} 4 \\ 7 \end{pmatrix}$ to $\begin{pmatrix} -12 \\ -21 \end{pmatrix}.$  Which vector does the dilation take $\begin{pmatrix} -2 \\ 5 \end{pmatrix}$ to?
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A dilation centered at the origin takes $\begin{pmatrix} 4 \\ 7 \end{pmatrix}$ to $\begin{pmatrix} -12 \\ -21 \end{pmatrix}.$  Which vector does the dilation take $\begin{pmatrix} -2 \\ 5 \end{pmatrix}$ to?
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\begin{pmatrix} 6 \\ -15 \end{pmatrix}
A dilation centered at the origin takes $\begin{pmatrix} 4 \\ 7 \end{pmatrix}$ to $\begin{pmatrix} -12 \\ -21 \end{pmatrix}.$  Which vector does the dilation take $\begin{pmatrix} -2 \\ 5 \end{pmatrix}$ to?
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