Determine whether the relation is a function. Explain. {(2, 9), (4, 9), (–7, 9), (0, 9), (5, 9), (3, 9), (–3, 9)} a. Yes, each x-value is paired with exactly one y-value. b. No, there is a y-value paired with more than one x-value. c. No, all the y-values are the same. d. No, there is an x-value paired with more than one y-value.