2. Theodore is writing the program for a video game. For one part of the game, he uses the rule (x, y) --> (x + 5, y – 3) to move points on the screen. (a) What output does the rule give when the input is (-5, 7)? Show your work.
(b) What output does the rule give when the input is (0, -3)? Show your work.
(c) Is the rule a function? Explain why it is or why it is not.