20 points! kara is graphing the equation |x| + |y| = a , where a is a real number.

determine whether each set of real numbers below results in exactly one point on the graph, no points on the graph, or infinitely many points on the graph.

select exactly one point on the graph, no points on the graph, or infinitely many points on the graph for each set of real numbers.

a > 0
a < 0
a = 0