Question

question
what is the image of the point (-7,9) after a rotation of 90° counterclockwise about the origin?
answer attempt 1 out of 2
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Explanation:

Step1: Recall rotation rule

The rule for a 90 - degree counterclockwise rotation about the origin is $(x,y)\to(-y,x)$.

Step2: Apply the rule

Given the point $(-7,9)$, where $x = - 7$ and $y = 9$. Substitute into the rule: $(-y,x)=(-9,-7)$.

Answer:

$(-9,-7)$