PLEASE HELP!!!!!! WILL GIVE BRAINLIEST!!!!!!!!!!

Alicia is writing the program for a video game. For one part of the game she uses the rule to move points on the screen.
(a) What output does the rule give when the input is ? Show your work.
(b) What output does the rule give when the input is ? Show your work.
(c) Is the rule a function? Explain why it is or why it is not