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Point D (-4, 9) is rotated 90 degrees counterclockwise. Which of the following is the y-coordinate of D'? 0 9 O 4 -4 -9 Next

Point D (-4, 9) is rotated 90 degrees counterclockwise. Which of the following is the y-coordinate of D'? 0 9 O 4 -4 -9 Next

Elementary Geometry For College Students, 7e
Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
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Question 1 5 pts Point D (-4, 9) is rotated 90 degrees counterclockwise. Which of the following is the y-coordinate of D'? -4 Next
Transcribed Image Text:Question 1 5 pts Point D (-4, 9) is rotated 90 degrees counterclockwise. Which of the following is the y-coordinate of D'? -4 Next
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When rotating a point 90 degrees counterclockwise about the origin our point A(x,y) becomes A'(-y,x)

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