A reflection takes $\begin{pmatrix} -1 \\ 7 \end{pmatrix}$ to $\begin{pmatrix} 5 \\ -5 \end{pmatrix}.$  Which vector does the reflection take $\begin{pmatrix} -4 \\ 3 \end{pmatrix}$ to?
Question:
A reflection takes $\begin{pmatrix} -1 \\ 7 \end{pmatrix}$ to $\begin{pmatrix} 5 \\ -5 \end{pmatrix}.$  Which vector does the reflection take $\begin{pmatrix} -4 \\ 3 \end{pmatrix}$ to?
Answer:
Let's think step by step.

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\begin{pmatrix} 0 \\ -5 \end{pmatrix}
A reflection takes $\begin{pmatrix} -1 \\ 7 \end{pmatrix}$ to $\begin{pmatrix} 5 \\ -5 \end{pmatrix}.$  Which vector does the reflection take $\begin{pmatrix} -4 \\ 3 \end{pmatrix}$ to?
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