QUESTION IMAGE
Question
what is the new y - coordinate when the following point is rotated 270° about the origin in a counterclockwise direction? (-9,9)
Step1: Aplicar la regla de rotación de \(270^{\circ}\) en sentido antihorario
La regla de rotación de \(270^{\circ}\) en sentido antihorario para un punto \((x,y)\) es \((x,y)\to(y, -x)\)
Step2: Sustituir \(x=-9\) y \(y = 9\) en la regla
Sustituyendo \(x=-9\) y \(y = 9\) en \((y, -x)\), obtenemos \((9,9)\)
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\(9\)