Create a Right Triangle in the Coordinate Plane

The video tutorial guides students through solving a standardized math test question by creating a right triangle on a coordinate plane. Wendy plots points J and K, and the task is to choose a point L from given options to form a right triangle. The tutorial demonstrates plotting these points and forming the triangle, concluding with the correct answer.

Explain the process Wendy used to determine the correct point L to form a right triangle.

What was the final answer Wendy concluded for point L?