i know the answer to 9 but i need help with 11 and 12 please

Question

9. The preimage of point A is located at (−1, 5). What are the coordinates

of the image, A', after a 270° counterclockwise rotation?

Answer: (5,1)

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11. Reason quantitatively. Use your answer from Item 9 to write a conjecture about the symbolic representation for a 270° counterclockwise rotation.

 

(x,y) → (  ,   )

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Question 5 (2 points)

LESSON 18-4 PRACTICE Page 244

12. Draw a figure on a coordinate plane. Rotate the figure counterclockwise

270° about the origin. How does your drawing confirm your conjecture

in Item 11?

 

The ordered pairs show (x,y) → (  ,   )

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Answer 1

(-1,5) is in quadrant 2

counterclockwise 270 is same as 90 clockwise

so image is found by switching x and y with both positive: (5,1)