Penn buys 3 large sandwiches to serve at a party. penn cuts the sandwich into 1/4 equal pieces to serve. penn didn't get any of the sand-which write an equation to represent the number of guests served if there were no leftovers. how many ok guests were served

Erin writes the set of ordered pairs below. the set represents a function. {(3, –3), (5, 0), (–1, 4), (–6, 7)} erin claims that she can add any point to the set and have the set still represent a function. which of the following points can be used to show that erin's claim is incorrect? select three that apply. (–6, 1) (–1, 9) (0, 5) (1, 7) (3, –2)