Alicia is writing the program for a video game. for one part of the game she uses the rule (x, y)-> (x-3,y+4) to move points on the screen. a) what output does the rule give when the input is (-6,0)? show your work b)what output does the rule give when the input is (3,-4)? show your work c) is the rule a function? explain why it is or why it is not