Can anyone describe the rotation curve of the Milky Way Galaxy and contrast its shape with the Solar System?

Question: This question is for my astronomy homework and the only thing I have so far is that the Milky Way Galaxy's rotation curve is kind of flat and the Solar System's rotation curve has the shape of a definite curve. Is that the answer or is there more? Did I word it right or does anyone have a better way of wording that?

Answer:
Here are some links with some of the information:

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