Which relation is also a function

Pete is making decorations for a dinner party. the instructions tell him to use 9 flowers for a medium-sized decoration. complete each statement to adjust the flowers for different-sized decorations based on these instructions.

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0