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polet [3.4K]
4 years ago
8

What is point A (-9, -18) rotated 90° counterclockwise?

Mathematics
1 answer:
DedPeter [7]4 years ago
7 0

Answer:

(18, - 9 )

Step-by-step explanation:

Under a counterclockwise rotation about the origin of 90°

a point (x, y ) → (- y, x ), thus

A(- 9, - 18 ) → (18, - 9 )

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Answers:

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=========================

How to get these answers:

Simply look at where the graph crosses the x axis to determine the x intercept. This is directly halfway between the -8 and -7, so the line crosses through -7.5 on the x axis meaning that the x intercept is located at (-7.5, 0)

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Any point is of the form (x,y)

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