Which relation is a function? graph with 5 points plotted at (negative 3, 2), (negative 2, 2), (negative 1, 2), (negative 2, negative 2), and (1, 1). graph with 5 points plotted at (negative 2, 1), (negative 1, negative 1), (2, 0), (3, 0), and (3, 2). graph with 5 points plotted at (negative 3, 2), (negative 2, negative 1), (0, 3), (1, 0), and (2, negative 3). graph with 5 points plotted at (negative 4, 0), (negative 1, 1), (1, 1), (1, 3), and (4, 0).