May be uneven because questions can be worth more or less (including zero) depending on your answer. Which of the relations given by the following sets of ordered pairs is a function?
{(-5, - 4), (- 4, – 3), ( – 3, – 2), (- 4, – 5), (- 2, – 1)}
{(0,3), ( – 6,8), ( – 3,5), (0, – 3), (7, 11)}
{(2, 4), (2,6), (2, 8), (2, 10), (2, 12)}
{(8, 1), ( – 4, 1), (3,5), (0,4), ( – 1, 2)}