Question

rotating a negative number of degrees
which shows the image of triangle wxy after the transformation $r_{0, - 90^{circ}}(x,y)$?

Explanation:

Step1: Recall rotation rule

A rotation of $R_{0,- 90^{\circ}}(x,y)$ means rotating a point $(x,y)$ counter - clockwise by $90^{\circ}$ about the origin. The rule for a $90^{\circ}$ counter - clockwise rotation about the origin is $(x,y)\to(-y,x)$.

Step2: Apply rule to triangle vertices

Take each vertex of triangle $WXY$ and apply the $(x,y)\to(-y,x)$ rule. Then check which of the given graphs has the vertices in the correct new positions after the rotation.

Answer:

(No answer options are given with text descriptions, so unable to provide a specific choice. But the general way to solve is as above. If there were options like "Option A: Graph with vertices in certain positions", we would identify the correct graph based on the rotation rule application).