Let $\mathbf{D}$ be the $2 \times 2$ matrix corresponding to the dilation, centered at the origin, with scale factor 7.  Find $\det \mathbf{D}.$
Question:
Let $\mathbf{D}$ be the $2 \times 2$ matrix corresponding to the dilation, centered at the origin, with scale factor 7.  Find $\det \mathbf{D}.$
Answer:
Let's think step by step.

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Let $\mathbf{D}$ be the $2 \times 2$ matrix corresponding to the dilation, centered at the origin, with scale factor 7.  Find $\det \mathbf{D}.$
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