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3 years ago

Rotate the point (1,2) 90° (-4,4) (0,2) (2,0) (-2,1)

Mathematics

1 answer:

saw5 [17]3 years ago

5 0

Answer: (-2,1)

Step-by-step explanation:

The point (1,2) is in quadrant 1.

When rotated 90 degrees counter clockwise, it moves to quadrant 2.

The new point becomes (-2,1)

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We compute the difference bewteen each element and the average:

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We square those differences:

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$\displaystyle \sum_{i=1}^n (x-\overline{x})^2=36+25+4+4+0+0=69$

And we divide by the number of elements:

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